Summer Water Damage in Chicago: Common Causes & Prevention

From steamy humidity to sudden, intense storms, summer can be peak season for water damage in Chicago homes and businesses.

At ServiceMaster of Lake Shore, we’ve seen it all in our 20 years of serving customers across Chicago and the suburbs.

We’re here to help you protect your property with expert prevention tips and fast, reliable restoration when you need it.

8 Common Causes of Summer Water Damage in Chicago—and How to Prevent Them

1. Heavy Rain and Storms

Chicago sees an annual average of 37.8 inches of rain, and any local knows that sudden downpours and severe thunderstorms are a hallmark of the summer season.

These intense cloud bursts can quickly overwhelm the city’s drainage systems and cause water to back up into basements or seep through foundation cracks.

Prevention:

• Keep gutters and downspouts clear of debris and make sure they’re draining at least 6 feet away from your home.
• Check that the grading around your foundation slopes away from the building.
• If you live in a flood-prone area, consider installing flood barriers or backwater valves.

2. Air Conditioner Leaks

When AC units are running nonstop in the heat, problems like clogged condensate drain lines or cracked drip pans can cause water to leak indoors.

Even worse, it often goes unnoticed until the damage is severe.

Prevention:

• Inspect and clean your AC unit’s condensate drain line every month during the hot and humid summer season.
• Replace cracked or rusted drip pans as soon as you notice them.
• If you have window units, make sure the unit tilts backward just slightly so that water buildup drains outside of the building, rather than in and onto your floors.

For more information, check out our guide on how to fix an AC leak.

3. Roof Leaks

Wind, hail, and debris from summer storms can damage shingles, rip flashing off the roof, or make it impossible for water to drain properly.

All of this can lead to problematic (and expensive) roof leaks.

Prevention:

• Schedule seasonal roof inspections, especially after big storms.
• Remove leaves, branches, and other debris from your roof and gutters.
• Check flashing around vents, chimneys, and skylights for any signs of wear or damage.

4. Plumbing Strain from Summer Activities

Water use typically spikes in the summer season, when people are busy gardening, filling pools, and running sprinklers.

All this extra use can strain plumbing systems and lead to summer water damage.

Prevention:

• Check indoor and outdoor faucets and hoses regularly for leaks or wear.
• Replace old hose fittings or connectors.
• Keep an eye on your water pressure—sudden drops could indicate a leak.

5. High Humidity

Chicago summers are humid and muggy.

All that moisture buildup causes condensation on cool surfaces and can lead to mold, mildew, and water damage in poorly ventilated areas.

Prevention:

• Run a dehumidifier in basements and other musty areas.
• Use exhaust fans in bathrooms and kitchens.
• Keep air flowing with ceiling fans or open windows when possible.
• Aim for indoor humidity levels between 30% and 50%.

6. Basement Flooding

Basements are naturally vulnerable to water damage and leaks, especially during summer rainstorms.

Foundation cracks, poor drainage, or sump pump failures can mean serious damage and flooding, even after a small storm.

Prevention:

• Seal any visible foundation cracks from the inside and consult a pro for exterior issues.
• Test your sump pump monthly and install a battery backup in case of power outages.
• Make sure basement windows and window wells are sealed and elevated.

To learn more about how to protect your basement, check out our guide on basement flooding.

7. Overflowing Pools and Hot Tubs

Overfilled pools and hot tubs can spill excess water onto patios and lawns, and unless your property is graded correctly, all that water will run right into your foundation or basement.

Prevention:

• Don’t leave pools or hot tubs unattended while filling.
• Install overflow sensors or automatic shut-off valves.
• Make sure the surrounding landscape slopes away from your house.

8. Appliance Leaks (Fridge, Dishwasher, Washing Machine)

During summer, appliances tend to work harder thanks to things like extra loads of laundry and lots of iced drinks from the fridge.

Over time, hoses and connections can weaken and leak, especially if the appliances they’re attached to happen to be pushed too close to the wall.

Prevention:

• Pull appliances out and inspect behind them at least twice a year.
• Make sure fridge icemaker hoses aren’t crimped or worn.
• Replace washing machine hoses and connectors every 5 years, and be sure that you know what water damage looks like.

What to Do If You Discover Water Damage

1. Stay safe. If there’s standing water, shut off electricity to the area before entering.
2. Document the damage. Take photos and videos to document the damage in the area for your insurance provider.
3. Start drying the area ASAP. The longer moisture sits, the worse the damage (and mold risk) becomes. Place some fans in the area to move air around and use towels or mops to sop up standing water, if possible.
4. Call ServiceMaster of Lake Shore. We’re available 24/7 across Chicago and the suburbs with expert water damage restoration services: (312) 707-8597

Dealing with a Water Damage Emergency in Chicago?! Call ServiceMaster of Lake Shore

Whether you’re facing a flooded basement or a mystery leak behind the wall, there’s no time to waste when it comes to water damage.

At ServiceMaster of Lake Shore, we’re proud to be Chicago’s trusted restoration experts, serving downtown and the surrounding suburbs with fast, friendly, and professional water damage restoration services.

Call us now at (312) 707-8597 to request service!