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How Do I Know When to Evacuate vs Stay During a Flood?

Last updated October 31, 2026

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The short answer

Listen to Official Orders

Local authorities decide when an area must evacuate. They base that decision on water levels, weather forecasts, and the stability of roads and bridges. If they tell you to leave, treat it as a direct instruction, not a suggestion. Delaying can put you and rescue workers in danger.

Keep a battery-powered radio or a charged phone with emergency alerts. Pay attention to reverse 911 calls, text alerts, and loudspeaker announcements. If you are unsure whether an order applies to your street, check with neighbors or call the non-emergency number for your local emergency management office.

Know Your Flood Risk

Your home's location matters more than anything. If you live in a floodplain, near a river, or in a low-lying area, the risk is higher. Heavy summer storms can cause flash flooding in many regions. Know whether your street has flooded before.

Look at the type of flood you face. A slow river rise gives you time. A flash flood from a sudden downpour can come with little warning. If water is already on your street, assume it will rise. Do not wait to see how bad it gets before you decide to leave.

  • Check if your home is in a mapped flood zone.
  • Know the elevation of your home relative to nearby water.
  • Identify the highest point in your neighborhood.
  • Plan two evacuation routes ahead of time.
  • Keep a go bag with documents, medicines, and clothes.
  • If you see water rising, do not stay to watch it.

When Staying Is an Option

Staying is only reasonable if you are not under an evacuation order and your home is structurally sound. That means no floodwater is inside, no risk of it entering, and no danger of the building collapsing. If you have a second floor, you can move upward, but that is not a long-term solution.

Consider your personal needs. If anyone in your home needs medical care, has mobility issues, or is very young or old, leaving sooner is safer. Also think about utilities. Floods can knock out power, gas, and water. Staying without those for days is harder than leaving early.

Dangers of Driving in Floodwater

Do not drive through flooded roads. Six inches of moving water can knock a person off their feet, and a foot of water can float a car. Most flood deaths happen in vehicles. If you see water across the road, turn around. Even if the water looks shallow, the road underneath may be washed out.

If you must evacuate, leave before roads are impassable. Once water covers the pavement, you lose your route. Summer storms can flood underpasses and low spots quickly. Have a plan for where you will go, whether it is a friend's house on higher ground or a public shelter.

After the Flood

Return only when officials say it is safe. Do not walk into floodwater, as it can hide sharp debris, live wires, or sewage. Check your home for structural damage before entering. If you smell gas or see sparks, leave and call the utility company. Take photos of damage for your insurance claim.

Flooded homes often need professional drying and cleaning to prevent mold. If water got into walls, floors, or the basement, you may need help with water extraction and structural drying. Local water damage pros can assess the situation and guide you on what to do next. Policies vary, and your insurer decides what is covered.

  • Wait for the all-clear before going home.
  • Wear boots and gloves when entering a flooded building.
  • Throw out food that touched floodwater.
  • Disinfect everything that got wet.
  • Run dehumidifiers and fans to dry out the space.
  • Have a professional inspect for hidden moisture.

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Frequently asked questions

What should I pack in an emergency go bag?

Pack water, non-perishable food, a flashlight, batteries, a first-aid kit, any medicines you take, important documents in a waterproof bag, cash, and a change of clothes. Include phone chargers and a portable radio. Keep the bag near your door so you can grab it quickly.

Can I stay on the second floor during a flood?

You can move to a higher floor temporarily, but it is not a safe long-term plan. Floodwater can rise higher than the first floor, and you could become trapped. If you are under an evacuation order, leave. If not, monitor the water level and be ready to go at any moment.

How do I know if my basement will flood?

Look for cracks in the foundation, poor drainage around the house, or a sump pump that does not work. If heavy rain is forecast, clear gutters and downspouts. If water has entered before, it will likely happen again. Consider installing a backwater valve or raising items off the floor.

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