How Do I Protect My Basement Before a Major Storm?
Last updated October 31, 2026
The short answer
Clear the Way for Water
Before a storm, walk around your home and check that gutters and downspouts are clear of leaves and debris. Clogged gutters send water cascading down the side of your foundation, which can overwhelm your basement walls. If downspouts are buried, confirm they drain at least a few feet away from the house.
Move anything stored directly on the basement floor to shelves or plastic bins. Cardboard boxes, furniture, and electronics soak up water fast and are hard to dry. If you have time, take photos of your belongings for your own records. That helps if you need to sort through damage later.
Test Your Sump Pump and Shutoff Valve
A sump pump is your first line of defense against rising groundwater. Pour a bucket of water into the pit and watch the pump turn on and drain. If it does not cycle properly, you may need to clean the float or replace the pump before the storm hits.
Find your main water shutoff valve and make sure it turns easily. If a pipe bursts during the storm, shutting off the water quickly limits damage. Write down the valve's location and keep it near your breaker box. In Columbus, that simple step can save you a lot of headache.
- Check that the sump pump discharge line points away from the foundation.
- Clear any debris from the sump pit that could clog the pump.
- Test the float switch by lifting it manually.
- Keep a backup battery or generator if you rely on a sump pump.
- If you have a floor drain, make sure it is not blocked.
Seal Small Cracks and Gaps
Look at your basement walls and floor for small cracks where water could seep in. Use a concrete patching compound to fill gaps around pipes, cables, and where the wall meets the floor. Pay attention to window wells and seal any gaps around window frames.
Do not try to seal large structural cracks yourself. Those need a professional assessment because they may signal foundation problems. If you see a crack wider than a quarter inch or one that is growing, note it for a water damage inspection after the storm passes.
Move Valuables and Documents
Bring anything valuable up to the main floor or place it on high shelves in the basement. Important papers belong in a waterproof container or a safe. If you have a freezer, make sure it is closed tightly and keep the door closed during a storm to protect food.
Keep a list of emergency contacts, including your insurance company and local water damage pros, in a dry place. That list helps you act fast if water gets in. Do not wait to move items until the storm starts; you may not have time.
Know When to Call the Pros
If water does enter your basement, do not wade in if the water level is above electrical outlets or if you smell gas. Turn off the power at the breaker if it is safe to reach, and avoid contact with floodwater that may contain sewage or chemicals. Your safety comes first.
For significant flooding or standing water, local water damage pros can help with extraction, drying, and cleanup. They have the equipment to handle large volumes of water and to dry out walls and floors properly. Their work usually involves removing damaged materials and using dehumidifiers to prevent mold growth. Policies vary, and your insurer decides what is covered.
- Never enter a flooded basement if the water is near electrical outlets.
- Turn off power at the breaker before entering if possible.
- Wear rubber boots and gloves if you must go in.
- Call your insurance company to report damage as soon as you can.
- Do not start cleanup until you have documented the damage for your claim.
Need help right now?
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Call Now (614) 412-4391Frequently asked questions
Should I unplug appliances in the basement before a storm?
Yes, unplug nonessential appliances and move them off the floor if you can. That reduces the risk of electrical shock and keeps them away from floodwater. If you cannot unplug safely, turn off the circuit breaker that powers the basement. Never touch wet appliances.
How can I keep water from coming in through the window wells?
Make sure window well covers are secure and clear of debris. If you have window wells, install plastic covers that snap on tightly. Clear any leaves or dirt that could block drainage. Also, check that the ground outside slopes away from the window wells so water does not pool against them.
What should I do if my basement floods even after I prepared?
Your first step is to stay safe. Do not enter if the water is deep or near electrical outlets. Turn off power if possible, then call your insurance company to report the damage. After that, contact the pros to handle extraction and drying. They can help prevent mold growth.