Flood Preparation at Home: Utilities, Vehicles, Documents and Cleanup Limits

What Flood Preparation at Home Actually Covers

Preparing for a flood means getting your utilities, vehicle, documents, and cleanup plan ready before water rises, not after. The single most important rule is this: never drive or walk through floodwater, even if it looks shallow. This guide walks through what to do before, during, and after a flood so your household can act fast and stay safe.

Before a Flood: Get Your Home Ready

Start by finding out if your home sits in a flash-flood-prone or landslide-prone area. Your local county planning department or geologist’s office can tell you. Flooding can happen anywhere it rains, so don’t assume you’re safe just because you’re outside a mapped flood zone.

• Secure or protect any hazards inside your home before a flood strikes
• Have a licensed electrician raise switches, outlets, circuit breakers, and wiring at least 12 inches above your home’s expected flood level
• Install backflow valves or plugs on drains, toilets, and other sewer connections so floodwater can’t back up into your home
• Anchor fuel tanks so they can’t tear loose and contaminate your basement or float downstream and damage other homes
• Install a sump pump with battery backup power
• Keep a working fire extinguisher and make sure your family knows how to use it

Because standard homeowner’s insurance does not cover flood damage, and flood insurance policies typically take about 30 days to go into effect, this is something to look into well before a storm is forecast, not after one is on the way.

Before a Flood: Utilities Shutoff Plan

Every adult in the household should know where the main power switch, main gas valve, and main water shutoff are located and how to use them. During a flood watch or warning, turn off utilities at the main switch and close the main gas valve if evacuation looks likely. If you are ordered to evacuate and have time, turn off gas, electricity, and water, and unplug appliances so they don’t cause an electrical shock when power comes back on.

Before a Flood: Vehicle and Evacuation Readiness

Keep your gas tank full during flood season so you’re never caught needing fuel during an evacuation. Pack a car emergency kit with food, flares, booster cables, a map, basic tools, a first aid kit, a fire extinguisher, and sleeping bags. Map out at least two evacuation routes in advance, since a primary road may be blocked or flooded when you need it. If you don’t have a vehicle available, arrange transportation with friends or family ahead of time.

A written household plan makes evacuation faster and calmer. Our family readiness plan guide covers how to set an out-of-town contact, choose meeting points, and map routes before you need them.

Before a Flood: Protect Your Documents

Losing identification and records can slow down recovery for weeks after a flood. Gather these documents now, before a storm is in the forecast:

• Identification: driver’s licenses, passports, birth certificates, Social Security cards
• Financial: insurance policies, bank account information, recent tax records
• Medical: prescription lists, immunization records, health insurance cards
• Property: deed or lease, vehicle titles, home inventory photos

Store original documents in a fireproof, waterproof box, keep paper copies sealed in a waterproof bag inside your emergency kit, and save digital copies to secure cloud storage or a password-protected USB drive you can grab on the way out. For a full rundown of what else belongs in that kit, see our prepper gear checklist.

Before and During: Food and Water Supply

Store at least 1 gallon of water per person, and per pet, per day, with a minimum 3-day supply on hand. Keep an emergency food supply that needs no refrigeration or cooking. Our food and water storage guide breaks down exact quantities and shelf-stable options.

Flood Watch or Warning: What To Do

• Gather the emergency supplies you’ve already stocked and stay tuned to local radio or TV for updates
• Have immunization records handy, or know the year of your last tetanus shot, in case of a puncture wound
• Bring in outdoor items like lawn furniture, grills, and trash cans, or tie them down securely
• Fill your clean water containers
• Adjust refrigerator and freezer thermostats to their coolest setting in case the power goes out
• If you have pets, contact your local emergency management office to ask about pet-friendly accommodations

If You Are Ordered to Evacuate

• Take only essential items with you
• If you have time, turn off gas, electricity, and water
• Disconnect appliances to prevent electrical shock when power returns
• Follow designated evacuation routes and expect heavy traffic
• Never drive or walk across flooded roads or creeks, even ones that look calm

Never ignore an evacuation order. Authorities issue them when you’re in a low-lying area or in the path of rising water.

Never Drive Through Floodwater

This is worth repeating on its own: turn around, don’t drown. Cars and other vehicles do not protect you from floodwater. Just six inches of moving water can knock a person off their feet, and vehicles can stall or be swept away in water that looks passable. Roadbeds can wash out underneath floodwater without any visible sign from the surface. If you come to a flooded road, find another route instead of trying to cross it.

Staying Safe If You Are NOT Ordered to Evacuate

Monitor the radio or television for updates and be ready to move to a shelter or a neighbor’s home if your house is damaged or officials instruct you to leave. Stay off bridges over fast-moving water, since it can wash out a bridge without warning. Move to higher ground or a higher floor rather than risk becoming trapped in a basement or attic.

After a Flood: Cleanup Limits and Contamination Rules

Floodwater can carry things you can’t see, including sewage, chemicals, and sharp debris. You cannot know exactly what is in it at any given moment, so the safest move is to avoid contact whenever possible.

• If you must enter floodwater, wear rubber boots, rubber gloves, and goggles
• Wash any skin that contacts floodwater with soap and clean water as soon as you can; use alcohol-based sanitizer if soap and water aren’t available
• Get prompt first aid for any wound, and seek medical attention for a puncture wound or one contaminated with soil, feces, or saliva
• Wash clothing that touched flood or sewage water in hot water and detergent before wearing it again
• Do not drink, brush your teeth with, cook with, or make ice or baby formula with water you suspect is contaminated
• If you have a private well in a flooded area, have the water tested before using it, and follow local guidance on municipal water safety

Re-Entering Your Home Safely

Do not go back into a flooded home until authorities say it’s safe. Once inside, all electrical equipment and appliances need to be completely dry before they’re used again. Throw out any food that touched flood or storm water, any perishable food that wasn’t refrigerated properly during a power outage, and anything with an unusual smell, color, or texture. When in doubt, throw it out, since contaminated food can look, smell, and taste normal and still make you sick.

Before, During, After: Quick Reference Checklist

• Before: Know your flood risk, raise electrical components, install backflow valves, secure fuel tanks, pack a car kit, map two evacuation routes, protect documents, store water and food
• During a watch or warning: Gather supplies, secure outdoor items, fill water containers, ready your pet plan, stay tuned to alerts
• If ordered to evacuate: Shut off utilities if there’s time, take essentials only, follow designated routes, never cross floodwater
• After: Wait for the all-clear before re-entering, avoid contact with floodwater, dry out electrical equipment fully, discard questionable food and water

Extra Caution for Certain Households

Some households need extra planning time and support. Tell local authorities in advance about anyone in your home who is an older adult, bedridden, or living with a disability, so responders know where extra help may be needed. Households with someone on power-dependent medical equipment should register with their utility company and think through a backup power plan. Families with young children, pregnant family members, or pets should plan for extra water, since needs increase in these situations, and should confirm ahead of time which shelters or hotels along their evacuation route accept pets.

Evidence Limits

This guide reflects general safety guidance from the CDC and Ready.gov. It is not a substitute for instructions from your local emergency management office, which knows the specific flood risks, evacuation routes, and shelter options in your area. Always follow official local guidance first, especially during an active flood watch or warning.

Frequently Asked Questions

Is it ever safe to drive through floodwater?

No. Floodwater can hide a washed-out roadbed, and moving water can stall or sweep away a vehicle even when the water looks shallow. Always turn around and find another route.

Does regular homeowner’s insurance cover flood damage?

No. Standard homeowner’s insurance policies do not cover flooding. Flood coverage is available through the National Flood Insurance Program, and policies typically take about 30 days to take effect, so it needs to be purchased well ahead of a storm.

How much water should my household store for a flood?

Store at least 1 gallon of water per person, and per pet, per day, with a minimum 3-day supply. See our food and water storage guide for a full breakdown by household size.

How do I know if it’s safe to go back into my home after a flood?

Wait until local authorities say it’s safe to re-enter. Once inside, make sure electrical equipment is completely dry before using it, avoid contact with floodwater, and throw out any food or water that may have been contaminated.

Educational Disclaimer

This article is for general educational purposes only and is not a substitute for guidance from local emergency management officials, a qualified electrician, your insurance provider, or a healthcare professional. Follow official evacuation orders and local safety instructions at all times.