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

