A heat-stress advisory is a control message, not merely a comment that the day feels hot.
People searching heat stress Singapore, WBGT advisory, outdoor work heat measures or sport heat safety need to read the correct risk band and activity framework.
Official MOM, WSH Council and SportSG material checked on 26 October 2026 distinguishes current measures from enhanced requirements taking effect on 1 December 2026.
Clear English connects measurement, workload, acclimatisation, hydration, rest, symptoms and authority so a team can act before heat strain becomes an emergency.
HEAT STRESS · WBGT · OUTDOOR SAFETY
Turn a heat advisory into visible protective action
Authenticate the advisory; understand WBGT; select the work or sport framework; separate announcement from effective date; assess acclimatisation, workload, clothing and duration; provide hydration and suitable rest; recognise symptoms; protect vulnerable participants; name decision owners; check live readings; and preserve a proportionate evidence trail.
Open the complete section index
- Authenticate the advisory
- Understand WBGT
- Match the framework
- Read the effective date
- Assess acclimatisation
- Plan hydration
- Use rest and shade
- Adjust workload
- Recognise symptoms
- Separate prevention from treatment
- Protect vulnerable participants
- Coordinate supervisors and coaches
- Check the live reading
- Avoid heroic language
- Keep an evidence trail
- Worked examples
- Practice studio
- Advice for students, parents and mentors
- Frequently asked questions
- Useful next reading
Official sources and the date boundary
The factual floor comes from the current official sources below. Read the live notice and the responsible authority or service provider together, because the individual case may change after this article was checked.
- MOM: Heat Stress Measures for Outdoor Work
- WSH Council: Enhanced Heat Stress Measures
- SportSG: Heat Stress Management Plan
- MSS Official Mobile Weather
These official pages were checked on 26 October 2026. Live interfaces, lists, contact details and procedures can change. Reopen the official source before acting, and keep the publication or update date visible.
Did You Know? WBGT includes more than air temperature. This is why a familiar temperature number can be a poor substitute for the official heat-stress measure used for an outdoor task.
1. Authenticate the advisory
Use MOM, WSH Council, MSS/myENV or SportSG sources suited to work or sport.
MOM requires heat-stress measures for outdoor work at varying WBGT bands.
Heat-stress advisory: A generic temperature app is treated as the workplace control plan.
Turn the passage into a decision row before acting. Build a heat-safety card with source, time, location, WBGT band, work or sport setting, workload, acclimatisation, clothing, duration, water, rest area, break schedule, vulnerable needs, supervisor, symptoms, response and next review. For this step: identify the activity; open the official source; check time and location; follow the responsible organiser. Preserve the source, time checked, person or item, present state, responsible actor and next verification point.
Read from worker, employer, coach, athlete, parent and first-aider perspectives.
Test the negative case: A message sent is not proof that it was received, understood or completed. A useful reader asks what evidence would prove that the step has not happened, because similar-looking words often belong to different stages.
Boundary: A weather temperature is not automatically a WBGT control decision. Source fit supports safety. This article does not measure a live site, certify compliance, diagnose or treat heat illness, override an employer, coach or event organiser, or replace MOM, WSH Council, MSS, SportSG, first aid or medical care.
A four-line working note
- identify the activity
- open the official source
- check time and location
- follow the responsible organiser
Write one sentence that preserves the source, object, finding and next action. Then ask what the document does not establish. That second sentence is often where mature comprehension appears.
2. Understand WBGT
Wet Bulb Globe Temperature combines environmental factors relevant to heat stress rather than reporting air temperature alone.
MOM states that four enhanced practices become mandatory requirements from 1 December 2026.
Heat-stress advisory: A cooler-looking cloudy period is assumed safe despite humidity and workload.
Turn the passage into a decision row before acting. Build a heat-safety card with source, time, location, WBGT band, work or sport setting, workload, acclimatisation, clothing, duration, water, rest area, break schedule, vulnerable needs, supervisor, symptoms, response and next review. For this step: read WBGT; read the risk band; consider workload; apply the correct measures. Preserve the source, time checked, person or item, present state, responsible actor and next verification point.
Keep temperature, WBGT, risk band, required control, symptom and diagnosis separate.
Test the negative case: A booking is not the same as attendance, service completion or clearance. A useful reader asks what evidence would prove that the step has not happened, because similar-looking words often belong to different stages.
Boundary: Air temperature and heat-stress index are different measures. Measurement supports science. This article does not measure a live site, certify compliance, diagnose or treat heat illness, override an employer, coach or event organiser, or replace MOM, WSH Council, MSS, SportSG, first aid or medical care.
A four-line working note
- read WBGT
- read the risk band
- consider workload
- apply the correct measures
Write one sentence that preserves the source, object, finding and next action. Then ask what the document does not establish. That second sentence is often where mature comprehension appears.
3. Match the framework
MOM workplace requirements and SportSG public-sport precautions address related but different duty settings.
SportSG’s heat-stress plan provides public sport precautions and points users to live advisories through myENV and NEA.
Heat-stress advisory: A recreational chart is used as an employer’s whole legal plan.
Turn the passage into a decision row before acting. Build a heat-safety card with source, time, location, WBGT band, work or sport setting, workload, acclimatisation, clothing, duration, water, rest area, break schedule, vulnerable needs, supervisor, symptoms, response and next review. For this step: name work or sport; identify the duty holder; use the relevant framework; add individual precautions. Preserve the source, time checked, person or item, present state, responsible actor and next verification point.
Use a live-measurement timeline plus a human-observation timeline.
Test the negative case: A general rule is not evidence that every individual case has the same state. A useful reader asks what evidence would prove that the step has not happened, because similar-looking words often belong to different stages.
Boundary: Related guidance is not interchangeable authority. Jurisdiction supports civics. This article does not measure a live site, certify compliance, diagnose or treat heat illness, override an employer, coach or event organiser, or replace MOM, WSH Council, MSS, SportSG, first aid or medical care.
A four-line working note
- name work or sport
- identify the duty holder
- use the relevant framework
- add individual precautions
Write one sentence that preserves the source, object, finding and next action. Then ask what the document does not establish. That second sentence is often where mature comprehension appears.
4. Read the effective date
MOM states that enhanced mandatory measures take effect from 1 December 2026.
MOM requires heat-stress measures for outdoor work at varying WBGT bands.
Heat-stress advisory: A future requirement is described as having applied throughout the year.
Turn the passage into a decision row before acting. Build a heat-safety card with source, time, location, WBGT band, work or sport setting, workload, acclimatisation, clothing, duration, water, rest area, break schedule, vulnerable needs, supervisor, symptoms, response and next review. For this step: copy announcement date; copy commencement date; separate current and announced duties; update procedures on time. Preserve the source, time checked, person or item, present state, responsible actor and next verification point.
Read from worker, employer, coach, athlete, parent and first-aider perspectives.
Test the negative case: A message sent is not proof that it was received, understood or completed. A useful reader asks what evidence would prove that the step has not happened, because similar-looking words often belong to different stages.
Boundary: Published is not yet effective. Policy timelines support history. This article does not measure a live site, certify compliance, diagnose or treat heat illness, override an employer, coach or event organiser, or replace MOM, WSH Council, MSS, SportSG, first aid or medical care.
A four-line working note
- copy announcement date
- copy commencement date
- separate current and announced duties
- update procedures on time
Write one sentence that preserves the source, object, finding and next action. Then ask what the document does not establish. That second sentence is often where mature comprehension appears.
5. Assess acclimatisation
New or returning workers may need additional protection while the body adapts to heat exposure.
MOM states that four enhanced practices become mandatory requirements from 1 December 2026.
Heat-stress advisory: An experienced colleague’s pace is assigned to a new worker.
Turn the passage into a decision row before acting. Build a heat-safety card with source, time, location, WBGT band, work or sport setting, workload, acclimatisation, clothing, duration, water, rest area, break schedule, vulnerable needs, supervisor, symptoms, response and next review. For this step: identify new or returning status; reduce initial exposure as required; monitor symptoms; review progression. Preserve the source, time checked, person or item, present state, responsible actor and next verification point.
Keep temperature, WBGT, risk band, required control, symptom and diagnosis separate.
Test the negative case: A booking is not the same as attendance, service completion or clearance. A useful reader asks what evidence would prove that the step has not happened, because similar-looking words often belong to different stages.
Boundary: Fitness does not guarantee heat acclimatisation. Individual variation supports health. This article does not measure a live site, certify compliance, diagnose or treat heat illness, override an employer, coach or event organiser, or replace MOM, WSH Council, MSS, SportSG, first aid or medical care.
A four-line working note
- identify new or returning status
- reduce initial exposure as required
- monitor symptoms
- review progression
Write one sentence that preserves the source, object, finding and next action. Then ask what the document does not establish. That second sentence is often where mature comprehension appears.
6. Plan hydration
Water access and regular drinking belong inside the work or sport plan, not as an afterthought.
SportSG’s heat-stress plan provides public sport precautions and points users to live advisories through myENV and NEA.
Heat-stress advisory: Participants drink only when very thirsty.
Turn the passage into a decision row before acting. Build a heat-safety card with source, time, location, WBGT band, work or sport setting, workload, acclimatisation, clothing, duration, water, rest area, break schedule, vulnerable needs, supervisor, symptoms, response and next review. For this step: provide accessible water; schedule reminders; avoid unsafe overcorrection; follow medical advice where relevant. Preserve the source, time checked, person or item, present state, responsible actor and next verification point.
Use a live-measurement timeline plus a human-observation timeline.
Test the negative case: A general rule is not evidence that every individual case has the same state. A useful reader asks what evidence would prove that the step has not happened, because similar-looking words often belong to different stages.
Boundary: Hydration helps but does not cancel high heat stress. Resource planning supports safety. This article does not measure a live site, certify compliance, diagnose or treat heat illness, override an employer, coach or event organiser, or replace MOM, WSH Council, MSS, SportSG, first aid or medical care.
A four-line working note
- provide accessible water
- schedule reminders
- avoid unsafe overcorrection
- follow medical advice where relevant
Write one sentence that preserves the source, object, finding and next action. Then ask what the document does not establish. That second sentence is often where mature comprehension appears.
7. Use rest and shade
Rest breaks and a cool or shaded recovery area reduce accumulated heat strain.
MOM requires heat-stress measures for outdoor work at varying WBGT bands.
Heat-stress advisory: A break occurs beside hot equipment in direct sun.
Turn the passage into a decision row before acting. Build a heat-safety card with source, time, location, WBGT band, work or sport setting, workload, acclimatisation, clothing, duration, water, rest area, break schedule, vulnerable needs, supervisor, symptoms, response and next review. For this step: identify a suitable rest area; schedule the interval; reduce workload; verify recovery. Preserve the source, time checked, person or item, present state, responsible actor and next verification point.
Read from worker, employer, coach, athlete, parent and first-aider perspectives.
Test the negative case: A message sent is not proof that it was received, understood or completed. A useful reader asks what evidence would prove that the step has not happened, because similar-looking words often belong to different stages.
Boundary: Stopping work briefly is not enough if the recovery environment remains hot. Environment supports biology. This article does not measure a live site, certify compliance, diagnose or treat heat illness, override an employer, coach or event organiser, or replace MOM, WSH Council, MSS, SportSG, first aid or medical care.
A four-line working note
- identify a suitable rest area
- schedule the interval
- reduce workload
- verify recovery
Write one sentence that preserves the source, object, finding and next action. Then ask what the document does not establish. That second sentence is often where mature comprehension appears.
8. Adjust workload
Physical intensity, clothing, equipment and duration alter heat burden.
MOM states that four enhanced practices become mandatory requirements from 1 December 2026.
Heat-stress advisory: A heavy task continues at normal pace because the advisory names only the weather.
Turn the passage into a decision row before acting. Build a heat-safety card with source, time, location, WBGT band, work or sport setting, workload, acclimatisation, clothing, duration, water, rest area, break schedule, vulnerable needs, supervisor, symptoms, response and next review. For this step: classify workload; rotate or reschedule; use mechanical help; reduce unnecessary exposure. Preserve the source, time checked, person or item, present state, responsible actor and next verification point.
Keep temperature, WBGT, risk band, required control, symptom and diagnosis separate.
Test the negative case: A booking is not the same as attendance, service completion or clearance. A useful reader asks what evidence would prove that the step has not happened, because similar-looking words often belong to different stages.
Boundary: The same WBGT can affect tasks differently. Variables support experiments. This article does not measure a live site, certify compliance, diagnose or treat heat illness, override an employer, coach or event organiser, or replace MOM, WSH Council, MSS, SportSG, first aid or medical care.
A four-line working note
- classify workload
- rotate or reschedule
- use mechanical help
- reduce unnecessary exposure
Write one sentence that preserves the source, object, finding and next action. Then ask what the document does not establish. That second sentence is often where mature comprehension appears.
9. Recognise symptoms
Teach early heat-illness signs and the immediate reporting and response route.
SportSG’s heat-stress plan provides public sport precautions and points users to live advisories through myENV and NEA.
Heat-stress advisory: A dizzy participant stays silent to avoid disappointing the team.
Turn the passage into a decision row before acting. Build a heat-safety card with source, time, location, WBGT band, work or sport setting, workload, acclimatisation, clothing, duration, water, rest area, break schedule, vulnerable needs, supervisor, symptoms, response and next review. For this step: stop activity; move to safety; cool appropriately; seek medical help according to severity. Preserve the source, time checked, person or item, present state, responsible actor and next verification point.
Use a live-measurement timeline plus a human-observation timeline.
Test the negative case: A general rule is not evidence that every individual case has the same state. A useful reader asks what evidence would prove that the step has not happened, because similar-looking words often belong to different stages.
Boundary: Determination must not override symptoms. Health vocabulary supports care. This article does not measure a live site, certify compliance, diagnose or treat heat illness, override an employer, coach or event organiser, or replace MOM, WSH Council, MSS, SportSG, first aid or medical care.
A four-line working note
- stop activity
- move to safety
- cool appropriately
- seek medical help according to severity
Write one sentence that preserves the source, object, finding and next action. Then ask what the document does not establish. That second sentence is often where mature comprehension appears.
10. Separate prevention from treatment
An advisory guides precautions; it does not diagnose or treat heat illness.
MOM requires heat-stress measures for outdoor work at varying WBGT bands.
Heat-stress advisory: A serious condition is managed only with extra water.
Turn the passage into a decision row before acting. Build a heat-safety card with source, time, location, WBGT band, work or sport setting, workload, acclimatisation, clothing, duration, water, rest area, break schedule, vulnerable needs, supervisor, symptoms, response and next review. For this step: recognise emergency signs; activate first aid; call 995 for emergency; follow clinical advice. Preserve the source, time checked, person or item, present state, responsible actor and next verification point.
Read from worker, employer, coach, athlete, parent and first-aider perspectives.
Test the negative case: A message sent is not proof that it was received, understood or completed. A useful reader asks what evidence would prove that the step has not happened, because similar-looking words often belong to different stages.
Boundary: A checklist cannot replace medical care. Boundaries support medicine. This article does not measure a live site, certify compliance, diagnose or treat heat illness, override an employer, coach or event organiser, or replace MOM, WSH Council, MSS, SportSG, first aid or medical care.
A four-line working note
- recognise emergency signs
- activate first aid
- call 995 for emergency
- follow clinical advice
Write one sentence that preserves the source, object, finding and next action. Then ask what the document does not establish. That second sentence is often where mature comprehension appears.
11. Protect vulnerable participants
Age, health conditions, medication and previous heat illness can change individual risk.
MOM states that four enhanced practices become mandatory requirements from 1 December 2026.
Heat-stress advisory: One group-wide instruction ignores a participant’s medical plan.
Turn the passage into a decision row before acting. Build a heat-safety card with source, time, location, WBGT band, work or sport setting, workload, acclimatisation, clothing, duration, water, rest area, break schedule, vulnerable needs, supervisor, symptoms, response and next review. For this step: invite private disclosure through proper channels; make reasonable adjustments; protect privacy; seek professional advice. Preserve the source, time checked, person or item, present state, responsible actor and next verification point.
Keep temperature, WBGT, risk band, required control, symptom and diagnosis separate.
Test the negative case: A booking is not the same as attendance, service completion or clearance. A useful reader asks what evidence would prove that the step has not happened, because similar-looking words often belong to different stages.
Boundary: Equal treatment is not always identical exposure. Inclusive communication supports teams. This article does not measure a live site, certify compliance, diagnose or treat heat illness, override an employer, coach or event organiser, or replace MOM, WSH Council, MSS, SportSG, first aid or medical care.
A four-line working note
- invite private disclosure through proper channels
- make reasonable adjustments
- protect privacy
- seek professional advice
Write one sentence that preserves the source, object, finding and next action. Then ask what the document does not establish. That second sentence is often where mature comprehension appears.
12. Coordinate supervisors and coaches
The responsible person should make the action, pause and resumption rules visible before activity begins.
SportSG’s heat-stress plan provides public sport precautions and points users to live advisories through myENV and NEA.
Heat-stress advisory: Everyone sees the advisory but nobody owns the decision.
Turn the passage into a decision row before acting. Build a heat-safety card with source, time, location, WBGT band, work or sport setting, workload, acclimatisation, clothing, duration, water, rest area, break schedule, vulnerable needs, supervisor, symptoms, response and next review. For this step: name the decision-maker; brief the group; record the trigger; announce changes clearly. Preserve the source, time checked, person or item, present state, responsible actor and next verification point.
Use a live-measurement timeline plus a human-observation timeline.
Test the negative case: A general rule is not evidence that every individual case has the same state. A useful reader asks what evidence would prove that the step has not happened, because similar-looking words often belong to different stages.
Boundary: Information without ownership can fail operationally. Leadership supports workplaces. This article does not measure a live site, certify compliance, diagnose or treat heat illness, override an employer, coach or event organiser, or replace MOM, WSH Council, MSS, SportSG, first aid or medical care.
A four-line working note
- name the decision-maker
- brief the group
- record the trigger
- announce changes clearly
Write one sentence that preserves the source, object, finding and next action. Then ask what the document does not establish. That second sentence is often where mature comprehension appears.
13. Check the live reading
Heat stress changes through the day and across locations.
MOM requires heat-stress measures for outdoor work at varying WBGT bands.
Heat-stress advisory: A morning reading is reused for an afternoon session.
Turn the passage into a decision row before acting. Build a heat-safety card with source, time, location, WBGT band, work or sport setting, workload, acclimatisation, clothing, duration, water, rest area, break schedule, vulnerable needs, supervisor, symptoms, response and next review. For this step: check near the activity; record time; recheck at intervals; respond to a higher band. Preserve the source, time checked, person or item, present state, responsible actor and next verification point.
Read from worker, employer, coach, athlete, parent and first-aider perspectives.
Test the negative case: A message sent is not proof that it was received, understood or completed. A useful reader asks what evidence would prove that the step has not happened, because similar-looking words often belong to different stages.
Boundary: A single reading is not a full-day guarantee. Sampling supports science. This article does not measure a live site, certify compliance, diagnose or treat heat illness, override an employer, coach or event organiser, or replace MOM, WSH Council, MSS, SportSG, first aid or medical care.
A four-line working note
- check near the activity
- record time
- recheck at intervals
- respond to a higher band
Write one sentence that preserves the source, object, finding and next action. Then ask what the document does not establish. That second sentence is often where mature comprehension appears.
14. Avoid heroic language
Frame rest, hydration and stopping rules as competence rather than weakness.
MOM states that four enhanced practices become mandatory requirements from 1 December 2026.
Heat-stress advisory: A team praises people who push through symptoms.
Turn the passage into a decision row before acting. Build a heat-safety card with source, time, location, WBGT band, work or sport setting, workload, acclimatisation, clothing, duration, water, rest area, break schedule, vulnerable needs, supervisor, symptoms, response and next review. For this step: normalise pauses; reward reporting; use neutral language; review incidents without blame. Preserve the source, time checked, person or item, present state, responsible actor and next verification point.
Keep temperature, WBGT, risk band, required control, symptom and diagnosis separate.
Test the negative case: A booking is not the same as attendance, service completion or clearance. A useful reader asks what evidence would prove that the step has not happened, because similar-looking words often belong to different stages.
Boundary: Culture can strengthen or defeat a written plan. Tone supports safety. This article does not measure a live site, certify compliance, diagnose or treat heat illness, override an employer, coach or event organiser, or replace MOM, WSH Council, MSS, SportSG, first aid or medical care.
A four-line working note
- normalise pauses
- reward reporting
- use neutral language
- review incidents without blame
Write one sentence that preserves the source, object, finding and next action. Then ask what the document does not establish. That second sentence is often where mature comprehension appears.
15. Keep an evidence trail
Record risk band, task, measures, briefing, symptoms, response and follow-up without unnecessary medical disclosure.
SportSG’s heat-stress plan provides public sport precautions and points users to live advisories through myENV and NEA.
Heat-stress advisory: A later review cannot tell which controls were active.
Turn the passage into a decision row before acting. Build a heat-safety card with source, time, location, WBGT band, work or sport setting, workload, acclimatisation, clothing, duration, water, rest area, break schedule, vulnerable needs, supervisor, symptoms, response and next review. For this step: date the record; name the activity; record actions; protect personal data. Preserve the source, time checked, person or item, present state, responsible actor and next verification point.
Use a live-measurement timeline plus a human-observation timeline.
Test the negative case: A general rule is not evidence that every individual case has the same state. A useful reader asks what evidence would prove that the step has not happened, because similar-looking words often belong to different stages.
Boundary: Documentation supports learning but does not prove perfect conditions. Records support continuous improvement. This article does not measure a live site, certify compliance, diagnose or treat heat illness, override an employer, coach or event organiser, or replace MOM, WSH Council, MSS, SportSG, first aid or medical care.
A four-line working note
- date the record
- name the activity
- record actions
- protect personal data
Write one sentence that preserves the source, object, finding and next action. Then ask what the document does not establish. That second sentence is often where mature comprehension appears.
Worked examples
Identity is not status
Match the activity and WBGT state before interpreting the outcome.
Reading lesson: Names and states do different jobs.
Current is not permanent
Read the update time and recheck when the decision is time-sensitive.
Reading lesson: Time words matter.
Notice is not completion
Use the notice to take the stated next action and then verify the result.
Reading lesson: A message can open a task.
Evidence is not a promise
Keep the record without claiming more than it proves.
Reading lesson: Confidence follows scope.
Heat-stress advisory reading studio
Measure sort
Separate temperature, WBGT, band and action.
- unit
- time
- location
- framework
After the exercise, explain which single word or field changed the decision. If the answer is “none”, the source may not yet contain enough evidence to act.
Task audit
Compare light and heavy outdoor work.
- load
- clothing
- duration
- rest
After the exercise, explain which single word or field changed the decision. If the answer is “none”, the source may not yet contain enough evidence to act.
Response drill
Write a symptom-and-action card.
- stop
- cool
- first aid
- emergency
After the exercise, explain which single word or field changed the decision. If the answer is “none”, the source may not yet contain enough evidence to act.
Advice for students, parents and mentors
For employers
Use the applicable MOM requirements and name responsible supervisors.
Prepare for enhanced requirements taking effect on 1 December 2026.
For coaches and parents
Use the sport-specific advisory and live conditions.
Normalise reporting symptoms and taking protective breaks.
For participants
Hydrate and follow controls without assuming water cancels every risk.
Stop and report symptoms early.
The goal is not to make a young person afraid of every official page. It is to make careful checking feel normal, achievable and quietly empowering. English becomes useful when it helps someone pause, verify, ask a precise question and choose a proportionate next step.
Frequently asked questions
What is WBGT?
A heat-stress measure that accounts for several environmental factors, not just air temperature.
Is a phone temperature enough?
No. Use the applicable official heat-stress source and framework.
Are work and sport rules identical?
No. Use MOM for workplace duties and SportSG guidance for sport settings as applicable.
What changes on 1 December 2026?
MOM states that four enhanced recommended practices become mandatory requirements from that date.
Why does workload matter?
Physical intensity changes the heat generated and accumulated by the body.
Why does acclimatisation matter?
New or returning participants may not yet be adapted to the heat exposure.
Is hydration enough?
No. Rest, shade, workload controls and monitoring also matter.
What if someone is dizzy or confused?
Stop activity, move to safety, use first aid and seek urgent medical help according to severity.
Who makes the decision?
The responsible employer, supervisor, coach or organiser must apply the relevant framework.
Why English?
Because temperature, WBGT, risk, control, symptom and diagnosis are different ideas.
Useful next reading
Continue with verified reading on related records, safety decisions and public services.
- English Learning Hub — the canonical route for practical English reading and communication
- Asking Better Questions in Class — a method for turning uncertainty into one precise question
- Reading Course and Career Information — how to preserve sources, conditions and decision boundaries
- Singapore Haze School Guide — how activity decisions change under another environmental stressor
- Reading an Electricity-Supply Interruption Update — how a public update becomes a safe action sequence
Heat safety becomes dependable when measurement and human observation lead to named controls. Careful English makes the live band, activity, duty holder, symptoms and next decision visible before urgency takes over.