Flash Flood Warning: What to Do Right Now (Updated November 12, 2026)

Verified and updated: November 12, 2026, 9:06 p.m. UTC.

If a flash flood warning covers your location, act now: move to higher ground, leave flood-prone areas, and follow evacuation instructions from local officials. Do not walk or drive through floodwater, even if it looks shallow. Water can rise quickly, conceal washed-out roads and other hazards, and sweep people or vehicles away.

The National Weather Service says a flash flood warning means flash flooding is occurring or imminent. This article focuses on immediate actions and their practical consequences. No specific current U.S. flood event was established by the sources checked; follow alerts for your exact location because local conditions can change quickly.

Destaques

• Move uphill or to a higher floor as soon as flooding threatens.
• Never drive around a barricade or enter a flooded road; turn around and find another route.
• If trapped by moving water, get to the highest safe point and call 911 if possible.
• Monitor official alerts and return only when authorities say it is safe.

What should you do first during a flash flood warning?

Stop what you are doing and identify the nearest safe higher ground. If you are in a low-lying area, near a creek, drainage channel, underpass, or flood-prone street, move away from it immediately. Walk uphill when that route is safe; do not drive out through a flooded area. If local officials order an evacuation, follow their route and instructions promptly. The NWS advises people to get to higher ground and leave before rising water cuts off access.

Take your phone, essential medication, and people or pets with you if they are immediately accessible, but do not delay leaving to gather belongings. If you are inside a building, go to an upper floor if water is approaching. Avoid basements and any room where water is covering outlets or submerged cords. The NWS warns that floodwater can carry electrical hazards.

Why is it dangerous to walk or drive through floodwater?

Depth and current are difficult to judge from the roadside, and water can hide a damaged or missing road surface, debris, wires, or chemicals. The NWS reports that six inches of fast-moving water can knock a person off their feet; its general flood guidance says 12 inches can float a car or small SUV. These are danger examples, not safe-crossing thresholds. Never test a road or path by entering the water.

Turn around when you encounter water across a road, and never drive around a barricade. Choose another route and keep away from low crossings, storm drains, culverts, and underpasses. Nighttime makes it harder to see water and damaged pavement. If your vehicle stalls in rising water, leave it and move to higher ground only if you can do so safely. Do not stay in a vehicle surrounded by fast-moving water.

What if you are trapped by rising water?

Move to the highest safe place you can reach without entering moving water. Call 911 if possible, tell the dispatcher your location, and follow instructions. Do not attempt to swim or wade across a current. If you are in a building, avoid electrical equipment and water near outlets. Alert rescuers to your location from a safe position.

How should you monitor conditions and what happens next?

Keep receiving alerts and listen to local emergency management, the National Weather Service, NOAA Weather Radio, or local radio and television. A warning applies to a specific area, and conditions may worsen or shift. Check the alert for the affected locations and instructions; do not assume clear skies nearby mean your route is safe.

After the immediate threat, stay away from floodwater and damaged roads. Do not return to an evacuated area until authorities say it is safe. Flooding can leave electrical, structural, and contamination hazards behind. The NWS advises people to avoid entering water where electrical equipment may be submerged and to follow official instructions after evacuation.

Sources: National Weather Service: Basic Flood Safety Rules; National Weather Service: During a Flood; National Weather Service: Flood Safety and Preparedness.

FAQ

Should I drive through shallow floodwater?

No. Do not drive through floodwater or around a barricade. Turn around and find another route.

Where should I go during a flash flood warning?

Move to higher ground or an upper floor, away from creeks, low spots, and flood-prone roads. Follow evacuation orders.

What if floodwater surrounds my car?

If it is safe to exit, leave the vehicle and move to higher ground. If trapped, call 911 and reach the highest safe point you can.