Spring Flood Season Prep Checklist: 12 Things to Do Before April
Spring is the deadliest season for home flooding in the United States. Snowmelt, saturated soil, and heavy rainfall combine to produce more flood events between March and June than any other period. Most of the damage is preventable — if you act before the season peaks, not during it.
This checklist is organized from quickest and cheapest to more involved. Work through it in order.
This Weekend (Free or Under $50)
1. Clear your gutters and downspouts. Clogged gutters are the #1 cause of basement flooding during moderate rain events. Clean them now, before they're tested. Cost: your time, or $100–200 to hire a service.
2. Walk your property grade. Stand at each foundation wall and watch where water would flow during heavy rain. If it flows toward your foundation, you have a problem. Redirecting grade with a bag of topsoil is a morning project that costs $20. Ignoring it costs far more.
3. Check your sump pump. Pour a bucket of water into the pit. The float should trigger immediately. If it doesn't, test the float switch. A sump pump that fails during a flood event is the same as not having one.
4. Locate your main water shutoff. If a pipe bursts during a flood, seconds matter. Know exactly where the shutoff is and confirm it turns easily. Penetrating oil on a stiff valve is a 5-minute fix.
5. Review your flood insurance policy. Confirm your coverage limits, your deductible, and — critically — what is and isn't covered. NFIP policies do not cover basement contents or temporary housing costs. Know this before you need to file a claim.
Next Two Weeks ($100–$500)
6. Install a battery backup for your sump pump. Power outages and flood events are correlated. The worst storm of the year is also the most likely time your power goes out. A backup unit ($150–350) ensures the pump keeps running. See our Sump Pump Guide for recommendations.
7. Pre-position flood barriers. Water-activated bags (Quick Dam, NOAQ, or equivalent) can be deployed in under 20 minutes. Buy them now. Stores run out during flood watches. Keep a supply in your garage for doorways, window wells, and the garage threshold. Our barrier comparison guide covers your options.
8. Seal basement window wells. Polycarbonate dome covers bolt over window wells and prevent them from filling with water during heavy rain. They're one of the most overlooked — and effective — flood entry prevention measures for basements. Cost: $50–150 per window.
9. Install a door threshold seal on your garage door. Garage flooding is the most common and least protected flood entry point. A threshold seal costs $30–80 and installs in 30 minutes.
Before April (Bigger Projects)
10. Have a plumber inspect your backflow valve. When street flooding occurs, municipal sewer lines can reverse flow into residential drain lines. A functioning backflow preventer blocks this. If you don't have one, spring is the right time to install it. Cost: $300–1,500 depending on your system.
11. Check your homeowner's insurance coverage. Standard homeowner's policies do not cover flood damage. If you don't have a separate flood policy, the 30-day NFIP waiting period means you need to act now — not when a storm is in the forecast.
12. Get a free risk assessment. Use our Risk Assessment tool to confirm your property's current flood zone designation. FEMA updates maps regularly; your zone may have changed.
The One Thing to Do Today
If you do nothing else on this list, test your sump pump. It's free, takes two minutes, and it's the single most common failure point that turns a manageable wet basement into a $30,000 claim.
Browse our product catalog for vetted flood protection gear at every price point, or visit the Knowledge Hub for deep dives on any of the topics above.