Flooding is the most common and costly natural disaster in the United States — and it doesn't only happen on coastlines. Inland flash floods from heavy rain, overwhelmed storm drains, and tropical systems moving far from shore damage thousands of homes every year. Standard homeowners insurance typically doesn't cover flood damage, which makes preparation doubly important.
This checklist walks through what to do before flood season, what to do when water is rising, and how to recover safely afterward.
Before: Know Your Risk
- Check your flood zone. FEMA flood maps show whether your property sits in a high-risk zone — but remember, a significant share of flood claims come from outside mapped high-risk areas. "It never floods here" is famous last words
- Review your insurance. Standard homeowners and renters policies exclude flood damage. Flood insurance usually has a 30-day waiting period before it takes effect — you cannot buy it the week a storm is forecast
- Sign up for local emergency alerts — flash flood warnings can arrive with minutes of lead time
- Know your evacuation routes and where you'd go, including which shelters accept pets
A Closer Look at Flood Insurance
This deserves its own section because it's the single most misunderstood part of flood preparedness:
- Standard homeowners and renters policies exclude flood damage. This surprises people every year. If water rises from the ground — storm surge, overflowing rivers, flash floods — your regular policy almost certainly won't cover it
- Flood insurance is usually a separate policy, available through the National Flood Insurance Program (NFIP) or private insurers
- There's typically a 30-day waiting period before a new policy takes effect. Buying it when a storm is already forecast is too late
- Document your belongings now. Walk through your home and photograph or video each room, including serial numbers on expensive items. Store the record somewhere off-site or in the cloud — this is what makes a claim smooth instead of miserable
- Renters need it too. Your landlord's policy covers the building, not your belongings. Contents-only flood policies exist and are relatively inexpensive
The paperwork takes an afternoon. The regret of skipping it lasts years.
- Move valuables and hazardous materials (paint, chemicals, fuel) to upper floors
- Elevate what you can: appliances, electrical panels, and HVAC equipment above potential flood level if you're in a flood-prone area
- Seal basement walls with waterproofing compounds and consider a sump pump with battery backup
- Keep gutters and storm drains clear of leaves and debris so water flows away from the house
- Stage deployable protection where you can reach it fast: sandbags or water-activated flood barriers that expand on contact with water — far easier to store and deploy than traditional sandbags
- Know how to shut off your gas, water, and electricity — label the shutoffs now, not during the flood
- Anchor fuel tanks so they don't float away and rupture
Before: Protect Your Documents and Supplies
- Store insurance policies, IDs, deeds, medical records, and emergency contacts in a fire-resistant waterproof document bag — and keep digital scans in secure cloud storage as a backup
- Build a go bag you can grab in minutes: water, snacks, medications, documents, phone charger, change of clothes
- Stock drinking water — floods frequently contaminate municipal supplies and wells
- Keep a first aid kit accessible (not in the basement), plus rubber boots and work gloves for cleanup
Before: Protect Your Vehicle
Cars are flood victims too — and they're expensive ones:
- When flooding is forecast, move vehicles to higher ground — a parking garage upper level, a hill, a friend's driveway on high ground
- Never park in dips, underpasses, or near storm drains that can back up
- Keep your fuel tank at least half full during flood season so you can evacuate without stopping
- Store a small emergency kit in the car: water, snacks, a flashlight, a phone charger, and a window breaker/seatbelt cutter tool
- After any flood exposure, don't start a car that sat in water — have it inspected first. Water in the engine or electronics can turn a bad day into a totaled vehicle
During: When Water Is Rising
Your safety is worth more than any property. Everything below assumes you've decided to shelter — if authorities order an evacuation, leave immediately.
- Move to higher ground. If trapped, go to the highest floor — never into a basement or attic without a way out
- Never walk or drive through floodwater. Six inches of moving water can knock an adult down; twelve inches can carry a car. "Turn around, don't drown" exists because people underestimate water every single year
- If your car stalls in rising water, abandon it. Climb to the roof if you can't reach high ground, and call for help. Cars can be replaced
- Avoid contact with floodwater — it can contain sewage, chemicals, sharp debris, and downed power lines
- Unplug electrical appliances if you can do so safely and stay out of rooms where water meets outlets
- Stay informed with a battery-powered or hand-crank emergency radio if cell service fails
- Keep pets leashed or crated — panicked animals bolt
After: Returning and Recovery
First: Safety Before Cleanup
- Return only when authorities say it's safe. Flooded roads may look passable but be washed out underneath
- Don't use electrical systems until they've been inspected if water reached outlets or panels
- Assume floodwater-contaminated everything it touched. Wear rubber boots, gloves, and a mask during cleanup
- Photograph all damage before you move or discard anything — your insurer and any disaster assistance applications will need it
Water Safety
- Don't drink tap water until authorities confirm the supply is safe — floods compromise treatment systems and wells alike
- Until then, use stored water, or treat questionable water with water purification tablets following the package directions — and when officials say to boil, boil
- Have wells tested before resuming use
Cleanup
- Remove standing water and begin drying within 24–48 hours to limit mold — open windows, run fans and dehumidifiers if you have power
- Discard anything porous that can't be thoroughly disinfected: mattresses, carpeting, upholstered furniture
- Clean hard surfaces with soap and water, then disinfect
- Throw out any food that touched floodwater, including canned goods with damaged seals
- Keep receipts for all cleanup and repair spending — you may need them for insurance or assistance claims
The Paperwork
- File insurance claims promptly with your photos and an itemized list
- If it's a declared disaster, check FEMA disaster assistance — and beware of post-disaster contractor scams. Never pay in full upfront, and verify licenses
The Bottom Line
Floods give less warning than hurricanes and strike far from the coast. The preparation is unglamorous — document bags, barriers, stored water, a go bag by the door — but it's the difference between a bad week and a ruined year. Do the boring work now.
Get flood-ready: water-activated flood barriers for doorways and garages, a waterproof document bag for what matters most, and water purification plus first aid for the aftermath.