What to Do When There Is a Flood | Germany Hochwasser, Starkregen and Emergency Safety Guide

If floodwater is rising near your home or workplace in Germany, stay away from underground rooms, flooded streets and watercourses, and follow the latest instructions from your municipality and emergency services. Floodwater can enter cellars, underground car parks and underpasses extremely quickly. Do not go downstairs to save a car or boxes when water is already entering. For people trapped, seriously injured or in immediate danger, call the fire and rescue service on 112. For urgent police emergencies, call 110.

Germany has two important flood patterns: Hochwasser, rising water often associated with rivers or lakes, and Starkregen, intense rainfall that can flood streets and houses even away from major rivers. If authorities instruct an evacuation, leave while the route remains safe. If moving water has already made the street dangerous, seek a suitable higher protected floor with an exit and contact rescuers instead of attempting a crossing. A sunny interval does not mean an upstream river has finished rising.

This practical guide helps residents, parents, students, workers and visitors across Germany, from the Rhine, Danube, Elbe and Oder basins to smaller streams and urban drainage networks. For live warnings use the Federal Office of Civil Protection and Disaster Assistance (BBK), the NINA warning app, Hochwasserzentralen flood information and local flood or civil-protection authorities. This article is not a live flood bulletin or road-safety certificate.

Quick answer: the first ten decisions

Check the current warning for your precise locality through NINA, Warnung.bund.de, your federal state’s flood centre and local authorities.
If the municipality orders evacuation, leave promptly by the instructed safe route before water or debris blocks access.
Do not enter a flooded cellar or underground parking garage. Water pressure and electricity can make these areas lethal.
Never walk, cycle or drive across flowing floodwater, even if another car has passed or the road normally seems shallow.
Avoid riverbanks and eroding edges. Water can undermine ground that looks firm from a distance.
Protect medication, documents and people with additional needs early, when the route is still dry and accessible.
If trapped by rising water, move to a higher suitable protected level with a way for rescuers to reach you, and call 112.
If electricity or heating oil is affected, do not touch wet equipment or enter contaminated rooms; report immediate hazards to 112.
Preserve emergency access by keeping away from closed roads, bridges and rescue operations.
Return only when authorised, and have buildings, electricity, gas, drinking water and structural concerns assessed.

Germany’s BBK immediate flood action guidance specifically warns that flooded basements and underground garages can become fatal traps.

Understand the difference between Hochwasser and Starkregen

Hochwasser refers to high water or flooding, commonly used for overflowing rivers or other water bodies. It may develop over hours or days as water travels downstream from a wider catchment. Starkregen describes particularly intense rain, which can overwhelm local drainage and cause rapid surface flooding even on streets not normally associated with a river.

The practical difference is warning time. A river monitoring station may show an approaching rise, allowing a household to prepare early. A short intense storm can flood a ground-floor flat, tunnel or underground garage much faster.

These mechanisms can overlap. Rain may overwhelm urban drainage and contribute later to elevated rivers. A flood guide should never claim that a household outside a mapped river floodplain is immune to all water hazards.

The first useful decision is identify where the water will travel and which escape route it may block first. Ask local authorities about maps for both river flooding and intense rainfall, rather than searching only for the nearest major river.

Germany’s federal system: who is responsible for what?

Germany’s flood management and emergency protection involve the federal government, the sixteen Länder, municipal authorities, fire and rescue services, weather services and water-management agencies. Each has different responsibilities.

The BBK, or Federal Office of Civil Protection and Disaster Assistance, provides preparedness and warning information. The Deutscher Wetterdienst (DWD) provides weather forecasts and severe weather warnings. The federal states operate flood-monitoring and forecasting services, while municipalities and their responders direct local protective action.

A national map or press article is not necessarily the authority deciding whether your particular street should evacuate. The local Feuerwehr, municipality or emergency management service may have more precise information on roads and reception centres.

Follow a specific current local instruction even when a broader national bulletin appears less alarming. Scientific risk data and operational evacuation orders are related but not interchangeable.

The NINA warning app: what it actually provides

NINA stands for Notfall-Informations- und Nachrichten-App. The BBK app provides civil-protection warnings and other relevant safety messages. It can integrate DWD weather information and flood warnings from responsible state agencies.

People can select relevant locations for alerts and must configure the app appropriately. The BBK’s NINA page explains how to subscribe to areas and receive important notifications.

An old warning on someone’s phone may no longer be the active instruction. Check the time, municipality, affected streets or area, warning level and the specific action requested.

Do not assume NINA is the only method of warning. Germany also uses Cell Broadcast, radio, television, sirens and official web messages. If you see immediate danger, act even if your device has not received a push notification.

Warnung.bund.de and other alert channels

Warnung.bund.de shows current official warnings that may be relevant to civil protection, weather and flooding. It can be useful when someone does not have the NINA app or wants to review warnings on a larger screen.

The BBK’s MoWaS warning-system overview describes the role of multiple delivery channels and the integration of local warnings.

Mobile messages can be delayed or unavailable because of network conditions, device settings, power loss or the user’s location. Local sirens may also have different meanings; seek the official accompanying instruction rather than inventing a meaning from the sound alone.

The safest approach is to have more than one way to receive information, and to know what to do when the warning is clearly addressed to your location.

Hochwasserzentralen: river conditions versus street flooding

The Länderübergreifendes Hochwasserportal provides access to flood information from Germany’s federal states. It is particularly useful for water bodies and hydrological monitoring.

A river gauge may show water level or forecast rise, but a number at one station does not tell you the water depth in every cellar or street downstream. Local barriers, tributaries, slope, drainage and terrain all influence what happens.

Check the timestamp and station location. Do not confuse an observed value with a prediction or a historical flood level, and do not use one reading as justification for crossing a road already covered by water.

A river map is a planning and monitoring tool. The current municipal evacuation or access instruction is what tells households where and when to move.

DWD weather warnings and local precipitation

Germany’s Deutscher Wetterdienst provides official weather warnings, including heavy rain, thunderstorms and other severe conditions. These help households prepare before water accumulates.

A forecast of intense rainfall does not automatically mean all neighbourhoods will flood, but it is especially relevant for streets below hills, basements and areas with drainage limits. Pay attention to the forecast time window and local wording.

A warning may remain relevant after the rain stops because rivers continue to carry water downstream. Conversely, a short storm can create flash flooding before a large river monitoring system shows an unusual level.

Check both weather and water warnings, particularly if your normal route includes low bridges, tunnels or riverbanks.

The most dangerous room may be below your feet

The BBK warns unequivocally against entering flooded cellars. A basement door may become impossible to open because of water pressure. Even shallow-looking water can conceal steps, pits, floating debris or electrical installations.

Many German homes and apartment buildings have basement storage, heating rooms or underground garages. Residents may be tempted to save a bicycle, car, documents or expensive equipment when the first water arrives.

Do not descend into a cellar already taking on water. If a building has flooded electrical equipment, contact qualified utility staff or emergency responders rather than attempting to reach the main panel through water.

The BBK guidance for immediate action explicitly describes underground garages as potential death traps.

Flooded underground garages: why vehicles must wait

Water can rush into an underground car park through a ramp. The deepest part may be invisible from the entrance, and exit routes may be blocked by vehicles or floating objects.

Do not attempt to move a car once the garage is flooding. Even if your vehicle appears to be standing in a shallow layer, electrical systems, lifting doors and pressure can create hazards.

If you have time before a predicted flood, authorities may advise moving cars from vulnerable parking places while routes remain safe. That is a preparation action, not permission to enter a garage during the flood.

Afterwards, wait for building management, fire services and appropriate professionals to confirm that the garage can be entered and that cars are safe to tow or operate.

Roads and underpasses: do not drive through the water

Floodwater can damage pavement or wash away the supporting ground. A road that looks level beneath muddy water may contain a deep hole or open drain. The current can move vehicles or leave occupants trapped.

Turn around before entering a flooded road or underpass. A large vehicle or four-wheel drive does not guarantee safety, and another driver’s crossing does not prove conditions are unchanged.

Avoid roads near collapsed banks and freshly damaged retaining walls. Do not bypass police or fire-service barriers. A navigation app may still display a normal route while emergency services know that it is closed.

When a journey is not essential, postpone it. For urgent medical needs, request safe assistance and give the precise location instead of attempting a dangerous crossing.

How to react when a river rises upstream

A household near the Rhine, Danube, Elbe or a smaller river may have an extended period to prepare for elevated water. The useful actions begin before the street is flooded.

Check the state’s flood forecasting service and any municipal evacuation notice. Identify safe routes, arrange transport for dependent household members, protect essential documents and medicines, and determine where to stay if leaving becomes necessary.

Do not assume a river’s rise has ended because the rain stopped locally. Water may still arrive from upstream catchments. A bridge could close before the home itself is inundated.

Use the early warning period for decisions that become impossible later, rather than spending it watching the river from an exposed bank.

What if floodwater is suddenly flowing down your street?

In a rapidly developing flash flood, identify the nearest safe route away from moving water. Do not run along the centre of a flooded street, descend into an underpass or enter a watercourse to cross to a familiar destination.

If a dry and safe exit exists, follow local instructions and move to a protected location. If the surrounding route is already unsafe, move to a higher suitable level with access for rescue and contact 112.

Avoid a sealed attic without an exit. A rooftop may be exposed to weather or structurally unsafe, so follow dispatcher directions and the conditions at your building.

A static article cannot determine whether your stairway, roof or neighbouring property is safe; the immediate goal is staying out of dangerous current while remaining locatable to rescuers.

What to tell the German emergency services

Call 112 for fire, ambulance and urgent rescue. In a flood report, give the Bundesland, town or district, street address, nearest identifiable landmark, number of people and their condition.

Explain whether the ground floor is flooded, which floor people occupy, whether anyone is injured or unable to use stairs, and whether electricity or hazardous materials are involved.

Use 110 for an urgent police matter. Do not use emergency numbers for routine updates on a river gauge or a delayed train; official warnings and operators provide those details.

Keep the phone available for the dispatcher’s callback. If possible, send a trusted person a concise message so others know where you are safe.

Family evacuation before the water arrives

A family should know where to go, which route remains out of the flood area, who assists dependents and how to communicate after reaching safety. The route needs a backup if the nearest bridge or underpass closes.

Keep identification, prescribed medicines, glasses, mobile phones and necessary child-care supplies accessible. Arrange a suitable destination outside the hazard zone; the safest location may be a relative’s home, municipal centre or other official accommodation.

When authorities order evacuation, leave promptly. Do not remain to save every possession or collect furniture from the cellar. A dry road today may be impassable later.

The main benefit of early evacuation is keeping the choice of safe travel open.

A small emergency bag for flooding

Prescription medicines, medical records and essential assistive devices.
Identity documents and key contacts in waterproof packaging.
Drinking water and practical ready-to-eat food for initial displacement.
A flashlight, charged phone, power bank and spare batteries.
Sturdy footwear, warm dry clothing and necessary hygiene supplies.
Infant feeding items, nappies, sanitary products or disability supplies as needed.
A written meeting point and out-of-area contact.
Keys, small cash and important information about pets where relevant.
A copy of the current local evacuation or shelter information.
A means of receiving official updates if normal internet service fails.

The bag should be light enough to carry while helping another person. Do not enter a flooded cellar or unsafe room to retrieve it after departure is urgent.

Older adults and people who need accessible transport

A resident using a wheelchair or walker may need more time and a suitable vehicle to reach a safe destination. A person dependent on powered medical equipment may require an alternative healthcare location if electricity fails.

Arrange help during a preparatory warning, not once water is at the building entrance. Keep medicines and medical information readily available and tell the local authority about special needs when requesting support.

If you call 112, give the exact floor and type of assistance required: “three residents on the second floor, one cannot walk down stairs” is more actionable than “we are trapped”.

An evacuation plan that works only for a person who can run and drive independently is incomplete.

Children, nurseries and schools

Schools should have arrangements for supervision, closure, evacuation and reunification when streets or bridges flood. A building can be dry while the route used by students is inundated.

Parents should follow the school’s current instructions rather than independently driving toward a flooded school entrance. Children need to know where to meet and which adult remains responsible until a safe collection takes place.

Teach a simple rule: “Never walk, cycle or ride through water covering a road. Stay with the teacher or parent and use the official safe route.”

Infants and children with medical or mobility needs require appropriate transport and supplies. Keep those arrangements up to date before heavy-rain warnings.

Apartments, lifts and building managers

Flooding may reach electrical rooms, pumps, the basement or the entrance of an apartment building without affecting higher apartments directly. Residents may therefore remain dry while losing access, lifts or drinking water.

Do not take a lift into a flooded underground level. Ask building management about electrical isolation and evacuation arrangements; do not touch waterlogged control equipment.

A resident needing a powered mobility aid or medical device may require extra assistance when services fail. Report such needs early to the appropriate emergency service.

The building being tall does not remove its ground-level flood and utility vulnerabilities.

Electrical danger: power can return without warning

Floodwater may conduct electricity when it contacts damaged wiring or equipment. A switchboard in a cellar can become hazardous, and power may be restored unexpectedly during recovery.

If power needs to be isolated, do so from a dry and safe position before water reaches the controls, and follow qualified instructions. Never stand in floodwater to turn off a breaker.

Do not touch fallen lines, submerged cables, heating equipment or appliances that have been flooded. Seek professional assessment before reuse.

A room becoming dry is not proof that its electrical installation is safe.

Heating oil, gas and chemical contamination

Some German properties use oil heating and have tanks or systems in lower rooms. Flooding can displace tanks or release oil, contaminating water and structures. Other buildings may contain cleaning chemicals, fuel or damaged gas installations.

The BBK advises contacting the fire service if dangerous substances such as heating oil are released. Avoid entering the contaminated area or attempting amateur cleanup.

If gas is suspected, leave the danger area, avoid flames and electrical switching, and contact the appropriate emergency or utility service from a safer place.

Not all floodwater can be made safe by boiling or filtering, especially when fuels or chemicals are involved.

Riverbanks and erosion after flooding

Flooding can undermine riverbanks, paths, roads and bridge approaches. A dry-looking edge may collapse when walked on, especially where water has eroded soil underneath.

Do not stand near the edge of a swollen river to take photographs. Avoid paths next to fresh scours or cracks in the ground. Follow closures and local authority guidance.

Children should not be allowed to play on new mud deposits or along receding water channels. Such areas may hide sharp debris or contamination.

The BBK explicitly warns that bank areas can be unsafe because of undermining and sudden collapse.

When the flood and a landslide happen together

Intense rain and saturated soil can also trigger slope instability, particularly on steep terrain or engineered cuttings. A hillside path may be blocked by fresh soil or rocks while the river below is high.

Do not climb an unstable slope as a shortcut to safety. The correct destination is stable ground outside the water’s path and outside any slide path, following local mapped routes.

A person who encounters fresh debris on a road should turn back when safe and notify authorities rather than attempt to drive across it.

Flood and slope hazards require separate checks, even when produced by the same storm.

Boats and voluntary rescue: avoid becoming another casualty

A boat may appear useful during flooding, but untrained travel on an inundated street or river can be dangerous because of current, submerged obstacles and emergency activity.

Do not launch a private boat merely to watch the flood or reach an isolated building without appropriate expertise and coordination. The BBK discourages unnecessary boat and vehicle activity in flood areas.

If someone has been swept away, call 112 and provide the last known location and flow direction. If a suitable flotation aid can be thrown safely from stable ground, follow appropriate first-aid or responder guidance, but do not enter the current as an untrained rescuer.

Rescue actions should save lives without creating additional people needing help.

Pets, horses and livestock

Before flood conditions become dangerous, plan safe movement or shelter for pets and farm animals. Keep carriers, leads, water and any necessary animal medicines accessible.

Do not remain in a mandatory evacuation zone solely to protect animals, and do not enter floodwater to retrieve them after a route has become dangerous. Inform responsible responders about any animals left behind.

Livestock owners should follow veterinary and local authority advice about contaminated feed, safe water and access to barns after flooding. Large animal transport may require earlier arrangements.

Planning ahead reduces the likelihood of a last-minute choice between animals and human safety.

Warnings that differ by neighbourhood

A flood can affect one street, basement or small catchment while a nearby area remains dry. A map showing a broad flood area should be read alongside actual municipal warnings and road closures.

Before forwarding a warning, check its source, date, exact municipality or address area and action. A photo of water in another German state is not evidence that your nearest bridge is closed.

A public safety alert may tell residents to stay indoors, evacuate or avoid particular routes. These directions should not be rewritten as one universal national order.

Specific information lets people act without creating unnecessary traffic or panic.

Safe drinking water and food after flooding

Floodwater may contain sewage, chemicals, fuel, debris and microorganisms. Do not use it for drinking, infant feeding or preparing food. Follow the local water supplier’s notice and public-health advice.

Boiling can help reduce certain microbial hazards where appropriate, but does not remove many chemical contaminants. If fuel or chemical contamination is suspected, use a verified alternative safe source.

Food in contact with floodwater may need to be discarded, and refrigerated foods may spoil after a prolonged outage. Do not use smell or appearance as the sole test of safety.

Health and sanitation must be restored before a household returns to normal cooking and drinking-water use.

Cleaning a home after a flood

Wait for permission from the responsible authority and check that the building is structurally and electrically safe. Wear sturdy footwear and appropriate protection when handling contaminated mud or debris.

Do not operate waterlogged electrical appliances, heating systems or gas installations until qualified professionals have assessed them. Do not climb unstable walls or remove a dangerous tree without expert assistance.

Document damage from safe positions for legitimate insurance or assistance claims. Keep children away from contaminated waste and open inspection pits.

A good recovery sequence is official clearance, human and structural safety, safe utilities, water and food, then repairs and property restoration.

When can you return?

The water receding is not necessarily the end of the emergency. Roads may remain unstable, bridges may need inspection and electricity can be damaged.

Return only when local authorities permit access, and comply with any building-specific restrictions. A building that still stands may have weakened foundations or a compromised cellar.

Check the state flood service and municipal information for the status of the affected area. Follow professionals’ directions for utilities and structure checks.

Re-entry is a process, not a single photograph of a dry street.

Businesses, deliveries and industrial sites

Employers should identify who monitors the warning, who can close operations and where staff can move without crossing flooded roads.

Do not require delivery workers or employees to enter a dangerous tunnel or submerged access road to maintain a timetable. Machinery in flooded lower rooms may require specialist electrical and chemical assessment before operation.

A business may have financial losses, but commercial urgency does not justify exposing staff to moving water, electricity or unstable structures.

Communicate reopening only when safe access and essential utility services are genuinely available.

Scenario 1: a basement begins filling during Starkregen

Imagine an apartment resident in a German city sees water entering the underground garage during intense rain. Their car and stored belongings are still downstairs, and the lift appears to be working.

The resident does not descend. They inform building management, keep others away from the basement and follow emergency directions. They contact 112 if people are trapped or immediate danger develops.

This is a fictional learning example, not a report of a current incident. The lesson is flooded underground spaces can become deadly faster than possessions can be retrieved.

Scenario 2: a Rhine community receives a river warning

A family living near a Rhine floodplain sees a state flood forecast and a municipal notice advising preparation. The house remains dry, but the route to the main road includes a low crossing.

The family moves medication and essential documents into a small bag, confirms a safe destination and leaves early when authorities instruct. They do not wait until water reaches the front door.

The lesson is river forecasts can create valuable preparation time if households use it.

Scenario 3: a driver reaches a flooded underpass

A driver approaches an underpass where water covers the road. The GPS continues to route through it, and another car appears to have entered.

The driver turns back at a safe point and checks for a verified dry route. The trip is delayed, but the vehicle and passengers are not trapped.

The lesson is a navigation app cannot measure current or hidden road damage.

Scenario 4: a resident finds a fallen cable after flooding

After a flash flood, a resident sees a cable lying in a shallow puddle beside the building. The neighbourhood power is off, so they think it is safe to move the cable with a tool.

They stay away, keep others clear and contact the relevant emergency or utility service. They do not touch the water or cable.

The lesson is outages do not guarantee fallen electrical lines are harmless.

Scenario 5: an older neighbour cannot use the stairs

A flood warning arrives for a building whose lifts may stop when electricity is disconnected. One older resident uses mobility equipment and cannot descend several flights independently.

Family members and authorities arrange an accessible departure while the route is dry. The resident brings essential medications and moves to an appropriate safe destination before the flood reaches the entrance.

The lesson is accessible evacuation must be planned ahead of the last safe travel window.

Scenario 6: water recedes but the cellar is still hazardous

A landlord sees that the flood level has dropped and wants to restart the heating and electrical systems immediately.

Instead, the landlord waits for qualified electrical and heating inspection, especially because the cellar contains potential fuel or gas equipment. Tenants are kept clear until safe access and operation are confirmed.

The lesson is the end of visible flooding does not restore utility safety.

Common flood mistakes in Germany

“Only houses beside major rivers can flood.” Intense rain can create severe urban and small-stream flooding.
“Water is only ankle-deep, so the cellar is safe.” Electrical equipment and pressure can make underground spaces lethal.
“My car must be moved from the underground garage right now.” Do so only before danger; never enter a flooding garage.
“A large SUV can handle a flooded underpass.” Road damage and current remain unpredictable.
“A river gauge number tells me my home’s exact water depth.” Local geography and infrastructure matter.
“If NINA did not send an alert, my route must be safe.” Warning delivery and local conditions can differ.
“The rain stopped here, so the river cannot rise.” Water may be travelling downstream.
“A dry riverbank is always solid.” Erosion can undermine the ground.
“The power is off, so electrical equipment is safe to touch.” Lines can remain live or be re-energised.
“Boiling removes heating oil from water.” It does not reliably remove chemical contamination.
“I’ll enter a cellar to disconnect the fuse board while standing in water.” Never do this.
“An old warning screenshot is still current.” Check official dates and the affected area.
“Floodwater has receded, so the road is safe.” Foundations may need inspection.
“A fire service barrier is only a suggestion.” Follow closures and rescue directions.
“Anyone can rescue a person by swimming into the current.” Untrained entry can produce a second victim.
“One building’s clearance means every nearby property is safe.” Individual utilities and structures may differ.

Frequently asked questions

What should I do first if a flood threatens my home in Germany?

Check NINA and your municipality’s flood instructions, stay away from cellars and dangerous roads, and evacuate early if directed. Do not cross moving floodwater.

What is the German emergency number for flood rescue?

112 for urgent fire, ambulance and rescue services. 110 for police emergencies.

What is the difference between Hochwasser and Starkregen?

Hochwasser refers to high water or flooding, often associated with rivers. Starkregen is intense rain that may cause rapid local or urban flooding, including away from large rivers.

Where can I see current German flood warnings?

Use NINA, Warnung.bund.de, Hochwasserzentralen and current municipal and state authorities.

Is it safe to enter a basement while it is flooding?

No. Water pressure, rapid filling and electrical danger can make basements and underground parking areas deadly.

Can I drive across a flooded street if the water looks shallow?

No. Hidden currents, washed-out pavement and other hazards can be impossible to judge visually. Turn around.

What if the ground floor is already surrounded by moving water?

Seek a higher suitable protected level with rescue access, contact 112 and give your precise location and assistance needs rather than attempting a dangerous crossing.

What if a heating oil tank was flooded?

Do not enter the contaminated area or attempt risky cleanup. Contact the fire or appropriate environmental authorities for guidance and qualified response.

When can I return to a flooded home?

After authorities permit access and relevant structure, electrical, heating, water and sanitation hazards have been assessed. Water receding alone is not sufficient.

Official Germany flood resources and related eduKate guides

Editorial review: 6 November 2026. This is general safety education, not a current German flood warning, property inspection or emergency dispatch service. Follow local authority and emergency service instructions for the actual situation.