Good flood preparedness means taking specific steps before a flood threatens, not during one. Examples include buying flood insurance well in advance, building a 72-hour emergency kit, protecting your home’s structure and utilities, creating a family communication plan, and safeguarding important documents. Any single one of these qualifies as good preparedness, but the strongest approach combines several of them. Here’s what each looks like in practice.
Stock a 72-Hour Emergency Kit
One of the most straightforward examples of flood preparedness is keeping a ready-to-grab emergency kit in your home. At minimum, this means one gallon of water per person per day for at least three days, a several-day supply of non-perishable food, a first aid kit, and any prescription medications your household depends on. Add non-prescription basics like pain relievers and anti-diarrhea medication, plus prescription eyeglasses or contact lens solution if anyone needs them.
The kit matters because floods can cut off access to stores, pharmacies, and clean tap water for days. Having supplies already packed means you aren’t scrambling to gather them while water is rising or while roads are impassable.
Buy Flood Insurance Before You Need It
Purchasing flood insurance is one of the clearest examples of good preparedness because it requires planning ahead. Policies through the National Flood Insurance Program typically have a 30-day waiting period before coverage kicks in. You cannot buy a policy when a storm is already in the forecast and expect it to cover the damage. Standard homeowners insurance does not cover flood damage, so without a separate flood policy, you’re financially exposed no matter how well you’ve prepared in other ways.
Protect Your Home’s Structure and Utilities
Physical changes to your home count as some of the most effective preparedness steps. These range from inexpensive to significant investments, but even small ones reduce damage considerably.
Installing backflow valves on your sewer and water lines is one of the most cost-effective upgrades, typically running $100 to $1,700 per line. These valves prevent sewage from backing up into your home during a flood. Applying waterproof sealants to exterior and basement walls costs roughly $600 to $4,000 and helps keep water from seeping through masonry. An interior drainage system with a sump pump, which costs between $2,000 and $10,000, removes any water that does get in.
Electrical systems deserve special attention. All wiring, switches, outlets, and electrical panels should be raised at least one foot above the base flood elevation for your area. This prevents the dangerous combination of standing water and live electrical components, and it protects expensive systems from needing full replacement after a flood. Elevating water heaters, furnaces, and washers to that same height follows the same logic.
If you have a sump pump with a battery backup, test the system one to two times per year. A sump pump that fails during the one event you actually need it defeats the purpose of having it.
Create a Family Communication Plan
A flood can separate family members who are at work, school, or running errands. Good preparedness means deciding in advance how you’ll reconnect. Pick two family meeting spots: one in your neighborhood and one outside it, in case your immediate area is flooded. Draw a simple map showing both locations and make sure every family member, including children, knows how to reach them.
Create a contact card for each person listing cell numbers, work numbers, and the number of at least one out-of-state relative or friend. Out-of-state contacts are useful because local phone networks often get overloaded during disasters, while long-distance calls may still go through. Every family member should carry their card in a wallet, purse, or backpack at all times.
Discuss how you’ll exit your home if the usual route is blocked by water. Identify at least two ways out of every room. For families with children, having kids draw a floor plan of the house and mark the exits turns this into something they’ll actually remember.
Safeguard Important Documents
Floodwater destroys paper quickly, and losing key documents creates months of bureaucratic headaches during an already stressful recovery. Good preparedness means identifying which documents matter most and storing them where water can’t reach them.
The priority list includes birth and marriage certificates, passports, Social Security cards, mortgage or lease agreements, vehicle titles, insurance policies (especially your flood policy), tax returns, wills, powers of attorney, and medical records like medication lists, immunization records, and health insurance cards. Pet ownership papers and custody documents also belong on the list if they apply to your household.
Store paper originals in a fireproof and waterproof safe or box at home. Then create electronic backups: scan or photograph each document and save the files in a password-protected format on a removable flash drive kept in that same safe, or upload them to a secure cloud storage service. The cloud copy is your insurance policy for the insurance policy. If your home is destroyed, you can still access everything you need to file claims and prove your identity.
Know What Flood Alerts Mean
Understanding the difference between a flood watch and a flood warning is basic preparedness that costs nothing. A flood watch means conditions are favorable for flooding, but it may not happen. This is your signal to review your plan, check your kit, and stay tuned to weather updates. A flood warning means flooding is imminent or already occurring. At that point, you should be executing your plan, not making one.
Flash flood warnings are the most urgent. Flash flooding happens fast, sometimes within minutes of heavy rainfall, and is the deadliest type of flooding in the United States. If you hear a flash flood warning for your area, move to higher ground immediately.
Understand Floodwater Dangers
Part of preparedness is knowing what you’re actually preparing for. Floodwater is not just rainwater. It routinely contains raw sewage, household chemicals, industrial waste, and bacteria. Exposure can cause wound infections, skin rashes, gastrointestinal illness, and tetanus. In coastal areas, naturally occurring bacteria in the water can cause serious skin infections through any open wound. Eating or drinking anything contaminated by floodwater can cause diarrheal diseases from pathogens like E. coli and Salmonella.
If you must enter floodwater, wear rubber boots, rubber gloves, and goggles. Cover any open wounds with waterproof bandages beforehand. Wash any skin that contacts floodwater with soap and clean water as soon as possible, and wash contaminated clothing in hot water and detergent before wearing it again. Do not let children play in floodwater areas, even after water levels drop. The contamination persists in puddles and saturated ground.