Summer Storm Prep Checklist: 12 Things to Do Before Storm Season
UHBy UsefulHow Editorial Team·Published Jul 9, 2026·Updated Jul 9, 2026·7 min read
Quick AnswerWork through this list before storm season, not after the first watch is issued: clean the gutters, test the sump pump and its battery backup, trim limbs hanging over the roof, secure anything loose in the yard, and sort out a generator plan that keeps the machine outside. Most of it fits into one weekend.
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Summer storms rarely hurt a house in one dramatic blow. The damage usually comes from water that got in through a tired roof, a gutter that overflowed for three hours, or a sump pump that quit during the outage nobody planned for. That is good news, because every one of those is a cheap fix in May and an expensive claim in July.
The list below is grouped the way the work actually goes: outside first, then water defense, then power, then paperwork. Do it once in late spring and the weekly forecast stops being a source of stress.
Start With the Roof, Gutters, and Trees
Outside the House- Scan the roof from the ground with binoculars. Look for missing, curled, or cracked shingles and rusty or lifting flashing around chimneys and vents. Repairs on a steep or high roof are a roofer's job, not a weekend ladder project.
- Clean the gutters and downspouts. A clogged gutter dumps roof water right against the foundation, exactly where you don't want it. Downspout extensions should carry water several feet away from the house, not pool it at the wall.
- Trim tree limbs that hang over the roof or driveway, and get dead branches out of the canopy. Anything big, high, or near a power line belongs to an arborist.
- Walk the siding. Re-caulk gaps around windows and where pipes and cables enter the wall. Wind-driven rain finds holes you'd swear weren't there.
If your yard slopes toward the house anywhere, that low spot is a future wet basement. A few wheelbarrows of soil graded away from the foundation, done on a dry weekend, beats any interior waterproofing product sold in a bucket. While you're down in the basement, look for the pale mineral stains and hairline cracks that mark where water has entered before — those spots tell you exactly which wall and which downspout to deal with first.
Keep Water Out of the Basement
Water Defense- Test the sump pump properly. Don't just look at it. Pour a bucket of water into the pit until the float rises and the pump kicks on, then watch the water leave. Check the discharge line outside while it runs.
- Test the battery backup too. Summer storms knock out power right when the pump is needed most, and backup batteries quietly age out after a few years. Our guide to whether a basement needs a sump pump covers backup options and sizing.
- Cover window wells and check that basement window seals aren't cracked or pulling away.
- Move stored gear up. Cardboard boxes and anything you care about should sit on shelves or pallets, not the slab, so a minor seep stays a mop job instead of a loss.
Generator Safety Is Not FlexibleCarbon monoxide from a portable generator can kill in minutes, and it gives no warning you can smell. Run the generator outside only, at least 20 feet from the house, with the exhaust pointed away from windows and doors. Never run one in a garage, even with the door wide open, and never on a covered porch. Let it cool down before you refuel it.
Plan for the Power Going Out
When the Lights Go- Assemble the outage basics now: a flashlight for every bedroom, spare batteries, a battery or hand-crank weather radio, and power banks kept charged. Candles are a fire risk; skip them.
- Give the generator a test run under load for ten minutes, check the oil, and store fuel in an approved container away from the house. Our power outage checklist covers what to do once the lights actually go out.
- Protect electronics with point-of-use surge protectors. A whole-home surge device at the panel offers broader protection, but that install is electrician territory.
- If a big storm is 48 hours out, fill the bathtub for flushing water, freeze extra water bottles to hold the fridge cold longer, and charge everything that takes a charge.
Secure the Yard and the Paperwork
Loose Ends That Matter- Store or tie down patio furniture, grills, trash bins, trampolines, and anything else the wind can pick up and throw at a window.
- Photograph every room — open the closets and drawers — and keep the photos in cloud storage. After a loss, those pictures are your proof of what you owned.
- Gather documents: insurance policies, ID, and a list of serial numbers for big electronics, in a waterproof pouch you can grab on the way out.
- Know your shutoffs. Everyone in the house should be able to find the main water shutoff and the breaker panel in the dark.
Perishable food is part of the power plan, too. An unopened fridge holds a safe temperature for roughly four hours, and a full freezer for about two days — half that if it's half empty. Knowing those numbers ahead of time stops the worst guessing game of every outage: what's still safe to eat.
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One insurance fact surprises people every year: a standard homeowners policy covers wind damage but does not cover flooding. Flood coverage is a separate policy, and it usually carries a waiting period of around 30 days before it takes effect, so buying it when a storm is already on the map is too late.
Mistakes That Undo the Prep
Waiting for the forecast. Roofers, tree crews, and generator shops all book out the moment a storm gets a name. The same work costs less and happens faster in the off weeks.
Testing the pump by eyeballing it. A pump that hums when you lift the float by hand can still have a jammed impeller or a dead discharge line. Only moving water tells the truth.
Treating winter prep as summer prep. Frozen-pipe work and storm work overlap in places, but they're different lists — our winter storm prep checklist handles the cold-season side.
The Bottom Line
None of this is hard, and almost none of it is expensive. Gutters, one bucket of water in the sump pit, a walk around the yard, and a folder of photos put you ahead of the large majority of storm claims, which start as small water problems that had days to grow. Put it on the calendar for the same weekend every spring and it stops being a project at all.
When should I do summer storm prep?Late spring, before peak storm and hurricane season in your area. That timing also leaves room to book a roofer or tree crew without competing with everyone who waited for a forecast.
Does homeowners insurance cover flood damage from a storm?Standard homeowners policies cover wind and rain that gets in through storm damage, but not rising flood water. Flood insurance is a separate policy and typically has a waiting period of about 30 days, so it has to be bought well ahead of any storm.
How do I test a sump pump?Pour a bucket of water into the pit until the float switch rises and the pump starts. Watch the water level drop and check outside that the discharge line is actually moving water away from the house. Test the battery backup the same way with the main pump unplugged.
Can I run a generator on a covered porch or in an open garage?No. Both put exhaust too close to living space, and carbon monoxide builds up fast. A generator belongs outside, at least 20 feet from the house, with the exhaust aimed away from windows and doors.
What if a storm is only two days out and I haven't prepped?Do the fast version: secure or store yard furniture, charge phones and power banks, fill the bathtub and some bottles with water, gas up the car, test the flashlights, and pull your documents and medications into one grab-and-go bag.
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UHUsefulHow Editorial TeamWe test home repairs in real houses and write the guides we wish we'd had. Every guide is reviewed against manufacturer instructions and current building codes.