If a typhoon is threatening your part of Japan, check the latest Japan Meteorological Agency (JMA) warning and your municipality’s evacuation instruction immediately. If you are in a flood, landslide or storm-surge danger zone and receive Alert Level 4 — Evacuation Instruction (避難指示), evacuate from the hazardous area before the road, river or slope becomes unsafe. Alert Level 3 — Evacuation of the Elderly, Etc. (高齢者等避難) means people who need extra time to move, including older adults and people with disabilities, should already leave dangerous areas. Do not wait for Level 5: conditions may already be life-threatening.
For urgent rescue or a medical emergency in Japan, call 119 for ambulance or fire services; call 110 for police emergencies. Use the JMA’s official warnings and 2026 alert-level explanation, JMA real-time risk information and the municipality’s published evacuation directions. A typhoon’s centreline on a forecast map does not tell you whether a specific slope, bridge, basement or coastal road is safe. Avoid floodwater and landslide-prone routes, including when rain has stopped locally.
Quick answer: A Japan typhoon emergency may progress through forecasts, weather advisories, rain and wind warnings, local evacuation levels 3 and 4, destructive rainbands, river floods, coastal storm surge, landslides and transport disruptions. The worst water hazard may continue after the typhoon centre moves away. A 2026 change is important: from May 2026, JMA reorganised warnings for heavy rain, river flooding, landslides and storm surge into a clearer five-level system aligned with municipal evacuation action. The weather warning is scientific risk information; the municipality’s evacuation message directs a particular community. Both need attention.
Eleven urgent actions for readers who need the answer now
- Check your actual JMA location’s weather warnings and any municipal evacuation notice. Note the time and the hazard, not only the storm’s name.
- At Level 3, people who need additional time should move early from exposed areas, including those requiring assistance or transport.
- At Level 4, everyone in a dangerous area should evacuate safely. Do not wait for Level 5.
- Do not cross flooded roads, rivers, underpasses, culverts or low bridges, even where traffic still appears to be moving.
- Avoid mountain slopes, steep road cuttings and river valleys when heavy rain creates landslide or debris-flow risk.
- Move away from exposed beaches, seawalls and low coastal areas when storm-surge or high-wave warnings apply.
- Once severe wind arrives, stay in an appropriate safe building, away from windows, exterior doors and loose roofing.
- If the outdoor evacuation route is already impassable, do not force a crossing. Seek the safest available position in a sound building and contact emergency responders for updated advice.
- Prepare medicine, water, food, identification, a flashlight, phone power and essential dependent-care items before access worsens.
- For immediate medical or rescue help dial 119; urgent police matters 110. Give the full municipality, district, street and landmark.
- Do not return until the actual road, building and neighbourhood restrictions are lifted, even if JMA’s typhoon warning is downgraded.
Stage 1 — The forecast forms: Japan’s typhoons have more than one hazard
Japan’s main typhoon season typically brings storms over the western Pacific that can threaten Okinawa, Kyushu, Shikoku, Honshu and surrounding islands. Track, intensity, rainfall and coastal exposure vary. The JMA issues forecasts before a potential approach and updates them as a storm develops.
A tropical cyclone’s rainbands may extend well away from the centre. Some locations experience heavy rain while the strongest winds pass elsewhere. A coastal settlement may face high waves or storm surge, a mountain village may face slope failure, and an urban neighbourhood may experience flooding of drains and underpasses.
The JMA forecast and warning service describes how weather warnings and hydrological risk information are issued. A forecast track is a changing estimate, not a precise border around dangerous conditions. Do not interpret its centreline as a safe-distance boundary for a home or road.
Before a typhoon approaches, learn whether your home, school, workplace or hotel is in a flood, landslide or storm-surge hazard area. The national hazard map portal can help locate maps, but the local government remains responsible for current evacuation destinations and instructions.
Stage 2 — May 2026: a key change in Japan’s weather warning system
Japan updated its warning presentation in May 2026. The Cabinet Office revised evacuation guidance in March 2026, and JMA began using new names and levels for relevant heavy-rain, flood, landslide and storm-surge information.
The JMA English explanation of Emergency Warnings states that heavy rain, flood, landslide and storm-surge warnings were reorganised into five alert levels in 2026. This gives residents a more direct link between meteorological danger and the action expected under the municipal evacuation framework.
However, weather messages and municipal evacuation notices are not identical. JMA can identify rapidly increasing risk before the municipality has issued or updated an evacuation instruction. A family should therefore consider the actual hazard and its location, rather than wait for exactly the same wording from both organisations.
The reorganisation should not be described as though all weather hazards use the same structure. Storm and high-wave warnings also have their own warning categories and practical consequences. Always read the exact hazard in the JMA notice.
Stage 3 — Alert Levels 1 and 2: when a family should prepare
At Level 1, early information indicates potential for dangerous weather. At Level 2, a more direct advisory indicates that people should check exposure and an evacuation plan. These stages are valuable because roads, schools and public transport may still be operating.
Identify the appropriate designated evacuation destination and a route that does not pass through the likely danger. A school building that is commonly used as a shelter may not be accessible for the present event, or it may be in another risk area. Consult the current municipal announcement.
Keep essential medicine, a flashlight, batteries, a portable charging supply, safe water, food that requires little cooking, waterproof identification and practical footwear accessible. Families with infants may need feeding supplies, while people with disabilities may require assistive equipment and accessible transport.
If you have a pet, check the municipality’s evacuation arrangements before the typhoon. Do not assume all shelters allow animals under identical conditions. Arrange care while routes remain safe.
Close shutters and secure balcony or garden objects only while the weather is safe for outside work. A roof or balcony should not be used once strong gusts threaten.
Stage 4 — Alert Level 3: people who need more time should leave now
At Alert Level 3, the municipality may issue Evacuation of the Elderly, Etc. People likely to need more time should evacuate dangerous locations. This includes many older adults, persons with disabilities, families with infants and those who cannot travel without help.
The Japan National Tourism Organization’s Level 3 guide makes clear that other residents should also prepare and may need to leave based on their circumstances. An evacuation level is not a command to send every person to any public building. A household already in a demonstrably safe location should follow the current local directions appropriate to its risk.
A family should not let the person with the greatest mobility needs be the last one to move. Arrange transport and accessibility early. If a road or lift is likely to close, the decision may need to come before the forecast’s most dramatic hour.
Tell a trusted out-of-area contact where the household intends to go. Check how schools or nursing facilities will communicate with guardians; do not attempt to collect a child across a flooded road.
Stage 5 — Alert Level 4: evacuation from dangerous locations must be completed
At Alert Level 4, the municipality issues an Evacuation Instruction (避難指示). The Japanese government safety guidance emphasises that all people in dangerous areas should evacuate by Level 4.
The key phrase is from dangerous locations. A person in a properly assessed safe location may not need to make an unnecessary journey, while someone on an exposed floodplain or beneath a dangerous slope needs to act. Follow municipal maps and instructions for the exact district.
Use the recognised dry route. Do not go through an underpass, across a flooded bridge or beneath an unstable hillside just to reach a shelter that was on the original plan. If the expected route has become dangerous, contact local officials and use the safest current alternative.
An instruction to leave should not become a last-minute property recovery exercise. Do not move furniture, retrieve a parked car from a basement or wait for a pet that is out of reach once departure is necessary.
Stage 6 — Alert Level 5: a disaster may already be underway
Alert Level 5 — Emergency Safety Measures (緊急安全確保) is a last-resort situation where danger is occurring or imminent. The authorities may not be able to issue Level 5 in every emergency. You should not wait for it before evacuating.
If a flood or landslide has already cut off outside access, attempting to travel to the originally planned distant shelter may be deadly. The JMA’s 2026 guidance states that in such circumstances, the safest available action may include moving away from a cliff or river within a nearby sturdy building and seeking a higher floor.
This is not a universal rule that every upper floor is safe. A collapsing building, unstable slope, fire or deep fast-flowing water may create different conditions. Seek real-time instructions from responders and remain clear of flooded electrical equipment.
Do not enter a closed attic without an exit, climb an unstable roof or attempt an improvised water crossing. A late-stage emergency needs specific decisions based on the actual environment.
Stage 7 — JMA KIKIKURU: a realtime risk map, not a safe road certificate
The JMA’s KIKIKURU risk maps show developing hazards using current observations and forecasts. The public can check heavy-rain or related risks for its region, including distinctions among water and slope threats.
The 2026 JMA guidebook explains its five-colour risk representation and reinforces that the aim is to evacuate by Level 4 where necessary.
A colour over one area does not tell you whether the only bridge between your home and a destination remains structurally sound. A flood can also change rapidly after a map refresh. Combine KIKIKURU with local government warnings, actual observed hazards and official road closures.
Check the issue time carefully. A screenshot from several hours earlier or a different municipality may not be relevant. Do not forward a warning without the source and time as though it is a live instruction.
Stage 8 — The first rainbands: why water can become dangerous before landfall
Heavy rain may start before the typhoon centre approaches Japan. Streams and drainage channels can begin filling, particularly where earlier rainfall left ground saturated.
A person living beside a river may not see intense rain at home while runoff moves downstream from another catchment. A railway or road may also close because of upstream hazards that are invisible from a station platform.
Do not travel into a mountain valley or along a riverbank to photograph swollen water. Bridges, culverts and roads can be undermined, and river current may increase between observations.
The timing of the heaviest rain is not necessarily the timing of the strongest wind. Protective action should be based on the specific current hazard rather than a rough assumption about when the storm eye or centre reaches a prefecture.
Stage 9 — Rivers, irrigation canals and flooded roads
Once water flows across a road, its depth, current and road condition may be impossible to judge. Hidden drains, damaged asphalt and debris can create a deadly trap. A car or motorbike may lose control, stall or be swept away.
Do not cross floodwater even when another vehicle or pedestrian has crossed. Conditions can change and the underlying road may be damaged.
Low bridges and riverside paths are particularly dangerous. A bridge may remain physically present while its approach is undermined, and a railway embankment may be weakened by water. Respect all traffic and railway restrictions.
If you are already in a sound building and water surrounds it, do not walk out through moving current. Seek a safer level and emergency guidance. If a building is structurally unsafe, the appropriate response needs local responder advice rather than a universal rule.
Stage 10 — Mountain slopes: landslides may arrive with little warning
Japan’s mountainous terrain and extensive rainfall can produce slope failures or debris flows. A hillside cutting above a road can release rocks or soil, while a valley stream can carry large amounts of debris.
Warning signs may include new cracks, leaning trees, muddy seepage or falling stones, but some landslides occur without useful advance warning. The absence of a sign cannot prove safety.
Do not stand below an unstable slope, travel through a closed mountain road or enter a gully to look for a safe shortcut. A road that appears clear on a navigation app may have been closed because of danger from above.
A local Level 3 or 4 order may reflect landslide exposure rather than obvious flooding. Follow the evacuation route mapped for that area, keeping away from both river and slope hazards.
Stage 11 — Storm surge and waves on the coast
A typhoon may raise coastal sea levels through storm surge, tides and large waves. Low coastal roads, harbours, beaches and river mouths may become dangerous before the storm centre arrives.
Do not stand on a breakwater, pier or seawall to photograph waves. A single wave can be much larger than the previous few, and saltwater can damage roads and electrical infrastructure.
JMA has incorporated storm-surge risk into the more clearly aligned 2026 five-level warning framework. The appropriate evacuation depends on the actual coastal map and municipal instructions.
Someone staying in a high-rise near the water should not infer safety solely from the floor number. Foundation, access, building design and local inundation risk all matter. Follow the local authorities’ assessment and instructions.
Stage 12 — Damaging wind, shutters, windows and balconies
Typhoons can create gusts that lift signs, roof materials, branches and unsecured balcony objects. In densely built districts, falling items from upper floors can also threaten pedestrians.
Secure objects while the weather is still calm, then remain indoors during severe wind. Stay away from large windows and balconies, and use the strongest suitable interior space available in the building.
Do not climb onto a roof or balcony to repair a loose fixture once the wind is dangerous. A small piece of debris can be dangerous at high speed, and a fall from a roof can be fatal.
A power outage may occur. Use battery lights and avoid lifts if service or electrical safety is uncertain. Do not run a fuel-powered generator inside a building, garage or room because carbon monoxide is deadly.
Stage 13 — A calm period does not guarantee the storm is over
Some typhoons have an eye or intervals of weaker wind. Conditions may briefly become calmer, with little rain or partial sunshine. Strong wind can return from another direction after the lull.
Do not go outdoors to check a vehicle, remove debris or take photographs merely because the weather has improved temporarily. Wait for the current official warning and local instruction.
The flood and landslide danger may continue even after the centre moves away. New upstream runoff and wet ground can affect a valley hours later.
Stage 14 — Schools, trains, buses and tourist journeys
Transport providers may cancel or delay Shinkansen, ordinary rail, ferries, buses or flights because of dangerous wind, rainfall, storm surge or infrastructure inspection. Their decisions can differ across lines and islands.
Check the operator’s actual announcement before travel. A ticket is not proof that the route is operating or that the road to a station remains safe. Do not make a hazardous journey simply to avoid losing a reservation.
Schools and childcare centres may close or change their arrangements based on prefectural and municipal decisions. Parents should follow the school’s safe release procedure, not drive through floodwater to collect children.
Visitors who do not read Japanese well can consult JNTO Safety Tips and seek clear guidance from authorised staff. Learn the actual district and lodging address so responders can locate you.
Stage 15 — How the municipality’s evacuation destination differs from a weather map
JMA provides scientific warnings, but a municipality identifies designated shelters, temporary safe locations and the places where residents must take protective action.
A gymnasium or school may be a designated shelter for some emergencies yet be unsuitable or inaccessible in another, particularly if a river or landslide affects access. An ordinary large building is not automatically the correct destination.
A family should know how to check the municipal site and any direct emergency message. When a local evacuation order names a specific district, read the area carefully rather than assuming all residents of the entire prefecture must take the same route.
If the household is already in a recognised safe location, do not create a dangerous journey through the storm just to reach a more distant building, unless the current authorities instruct otherwise.
Stage 16 — What to tell Japan’s emergency services
Call 119 for ambulance, fire or urgent rescue and 110 for police emergencies. In a flood or typhoon emergency, the dispatcher needs a precise address or nearby landmark, number of people, injuries and whether water or debris prevents access.
Tell responders whether someone uses a wheelchair, is dependent on powered medical equipment or cannot walk. Do not try to carry a person through moving floodwater without training.
For visitors, the ward, city, hotel name and address in Japanese can help. Ask hotel staff to write the address before the storm arrives.
Avoid making nonurgent calls to emergency lines for routine weather questions; use JMA and the municipality’s public announcements for that purpose.
Stage 17 — A business or home is surrounded by floodwater: a difficult decision
If the only outside route is already flooded, the original evacuation plan may no longer be safe. Walking or driving through current can cause death even if a shelter is close.
In a sound building, move away from lower flooded areas and electrical equipment. A suitable upper level may provide temporary refuge, but do not enter a sealed attic with no exit and do not remain in a building that is visibly failing if a safer alternative and current responder instructions are available.
Call 119 for urgent rescue or seek municipal emergency guidance. Describe the water level and whether the stairway is safe.
A large shopping centre or train station may have its own emergency procedures. Follow authorised staff instructions that reflect the actual hazards in that building.
Stage 18 — After the wind weakens: road and river hazards remain
A downgrade of a typhoon warning is not an all-clear for every hazard. Rivers may continue rising, slopes may remain saturated and transport systems may need inspection.
A bridge can be damaged below the waterline even though it looks intact. Do not bypass a police barrier or use a route that has not reopened.
Fallen trees, broken power lines and hanging roof materials may be unstable. Stay clear of damaged areas and allow emergency crews access.
Keep using current hazard information and obey municipal restrictions until the relevant risk is reduced and access is authorised.
Stage 19 — Safe water, electricity and food after flooding
Floodwater may contain sewage, chemicals, mud and sharp debris. Do not allow children to play in waterlogged streets or near drains. Wear suitable shoes when authorities permit cleanup.
Follow local public-health and water-supplier advice before using a water source that was affected by flooding. Boiling reduces many microorganisms but does not remove fuel or every dissolved chemical.
Do not touch wet electrical panels, exposed wiring or submerged appliances. A qualified person should inspect affected electrical systems before service is restored.
Food that was touched by floodwater or stored without safe refrigeration for too long may need to be discarded. Follow local food-safety instructions rather than assuming all items can be rinsed.
Stage 20 — Landslide and infrastructure recovery
A road or building near an unstable slope may remain closed even after the sun returns. The ground can be saturated and weakened for longer than the storm’s visible duration.
Do not examine deep cracks at close range or move heavy debris from beneath a retaining wall without qualified guidance. Engineers may need to assess slopes, bridges and foundations before reopening.
A rural community may be cut off from hospitals, schools or markets. If someone has an urgent medical need, tell emergency services about the access limitation rather than taking an unsafe shortcut.
Recovery can require transport restoration, temporary housing and support for families whose homes cannot yet be occupied safely.
Stage 21 — Elderly residents, disabled people and children during evacuation
People who require more time to travel are specifically recognised in Japan’s Level 3 evacuation framework. A family should make this plan concrete: who will help; whether there is a wheelchair-accessible route; which shelter has appropriate toilets; and whether essential medication can be carried.
A child may not understand the difference between a heavy-rain warning and a Level 4 evacuation order. Use concise instructions and keep designated caregivers responsible for the child’s movement.
People living alone may need someone to verify that the warning arrived. A brief welfare check before the wind becomes severe is far safer than a late attempt to rescue someone across a flooded street.
Stage 22 — The common mistake of waiting for Level 5
A person may reason that Level 4 is not the most serious category and therefore there is still time. This is precisely the error the Japanese government warns against. At Level 5, a disaster may already be happening and normal evacuation may be impossible.
The government’s July 2026 public education article tells residents to leave dangerous locations by Level 4, and at Level 3 when they need extra time.
An early safe evacuation may appear unnecessary if the storm later misses the locality. That does not mean it was irrational. Forecasts are uncertain; the goal is to protect people before access becomes impossible.
Do not judge a family’s protective decision only by the eventual weather outside their house. The information and risks available at the moment matter.
Stage 23 — Why Japan’s evacuation and weather alert levels are related but distinct
The municipality issues evacuation information about people and places. JMA issues weather information describing a hazard and its likelihood or severity.
Since May 2026, relevant weather advisories and warnings for flooding, heavy rain, landslides and storm surge have more directly corresponding level numbers. This helps residents interpret risk, but the language is not a promise that JMA and a city will always issue messages simultaneously.
A high-risk weather alert may arrive before a local evacuation order. Conversely, a local authority may order evacuation because of a damaged road or other site-specific factor not fully represented on a broad regional weather map.
Use the two together and avoid treating a forecast graphic as an evacuation permit.
Stage 24 — Questions to ask when returning home
Once authorities permit return, ask whether the road is open, the building remains structurally safe, utilities have been inspected and drinking water is confirmed usable.
Check from a safe location for cracks, loose roofing, leaning trees, wet electrical equipment and contaminated mud. Do not enter a serious damaged structure.
Document losses for recognised assistance, insurance or rental purposes only after access is safe. Avoid strangers promising guaranteed payouts in return for passwords or fees.
If the home is uninhabitable, seek official temporary accommodation or support. Normal weather is not proof that housing, transport and health services have been restored.
Three examples: a city family, mountain visitor and coastal hotel
Scenario A — Family near a river: The municipality issues Level 3 for an exposed riverside neighbourhood. The family has a grandparent who uses a walking frame, so they leave early with medicines and essential supplies. When Level 4 follows, they are already at the recognised safe location. This is an illustrative example, not a live flood report.
Scenario B — Mountain road visitor: A traveller sees a typhoon forecast and a landslide warning affecting the route to a remote mountain lodging. They change plans before travel rather than rely on a road that may later close. A clear sky at the destination does not mean the mountain pass is safe.
Scenario C — Coastal hotel: A visitor receives a storm-surge and high-wave warning. Hotel staff identify current local protective instructions. The visitor stays away from the beach and does not photograph waves from a breakwater. The emergency decision is based on the actual coastline and local hazard.
These scenarios teach decision-making; they are not claims about active warnings in Tokyo, Okinawa, Kyushu or elsewhere in Japan.
Eight misconceptions to avoid
- “A typhoon’s forecast centreline describes the entire danger.” Rain, wind, landslide and surge exposure extend farther.
- “Level 3 means only older adults need to know about the warning.” All residents should prepare; those requiring more time leave earlier.
- “Level 4 means wait until Level 5 before deciding.” Everyone in danger should evacuate by Level 4.
- “A high floor is always safe.” Building integrity and actual risk matter.
- “Rain stopped, so the river cannot rise.” Upstream water can arrive later.
- “A train running elsewhere means my local route is safe.” Transport and road status differ.
- “An old hazard-map screenshot is a live evacuation order.” Confirm current sources, time and district.
- “The end of the typhoon warning makes every building and bridge safe.” Recovery restrictions may remain.
Japan typhoon preparedness checklist
- Bookmark JMA current warnings and KIKIKURU.
- Check the hazard map portal and your municipality’s exact evacuation information.
- Learn the 2026 five-level weather warning alignment and the municipality’s Level 3, 4 and 5 actions.
- Know 119 ambulance/fire and 110 police and the full Japanese address of your home or accommodation.
- Prepare medicines, identification, water, food, lighting, power bank and suitable footwear.
- Plan accessible evacuation for older adults, disabled people, children and anyone needing medical treatment.
- Avoid flooded roads, mountain slopes, rivers and exposed coasts during warnings.
- Do not enter basements or flooded utility areas to retrieve possessions.
- Return only with local clearance and appropriate checks of structures, roads and water.
Frequently asked questions
What is Alert Level 4 during a typhoon in Japan?
It is the Evacuation Instruction stage: everyone in dangerous areas should evacuate by this point using a safe recognised route.
What should happen at Level 3?
People needing extra time to move, including older adults and people with disabilities, should evacuate dangerous areas; others should prepare and may need to leave based on exposure.
Should I wait for Level 5?
No. Level 5 means a disaster may be happening or imminent, making normal evacuation unsafe or impossible.
Did Japan change its weather warnings in 2026?
Yes. JMA reorganised heavy-rain, flood, landslide and storm-surge warning information into five levels aligned with evacuation guidance from May 2026.
What number do I call for rescue?
119 for ambulance or fire/rescue, and 110 for police.
Can I cross a road with shallow-looking floodwater?
No. Current and hidden damaged road surfaces may make it deadly.
If the typhoon passes, may I return to a closed area?
Only after the relevant authority lifts the restriction and the access is safe.
Official sources and related eduKate guides
- JMA — Weather Warnings and Emergency Warnings: 2026 warning levels and categories.
- JMA — Forecast and Flood Warning Services: meteorology, river forecasts and warning arrangements.
- JMA — Alert Levels and Evacuation Actions: guidance on Levels 1–5 and municipal instructions.
- JMA — Realtime Risk Maps (KIKIKURU): rain, flood and landslide risks.
- JMA — 2026 Flood and Heavy-Rain Warning Guidebook: updated warning levels and actions.
- Cabinet Office — March 2026 Evacuation Guidance Revision: 2026 alert-language update.
- Japanese Government — Evacuate by Level 4, July 2026: current preparedness messages.
- JNTO — Level 3 Evacuation for Elderly and Other Residents: English visitor guidance.
- Japan Hazard Map Portal: flood, landslide, tsunami and other hazard map links.
- eduKateSG — Typhoon in Taiwan: compare Taiwan’s sea and land warnings.
- eduKateSG — Earthquake in Japan: separate earthquake actions and evacuation.
- eduKateSG — Flash Flood in Vietnam: another national system for fast-moving water hazards.
Reader note — reviewed 7 November 2026: This is general disaster preparedness, not a live JMA warning, personal evacuation instruction or road inspection. Use current JMA data, municipal orders, emergency responders and transport restrictions for immediate decisions.