Drought and heavy rain draw roaches indoors in GA. Here’s how to keep them out

So far this year, Georgia has seen serious drought conditions and excessive rains, and no matter the weather, the roaches are coming inside.

Heavy rain floods their outdoor hiding spots while drought dries up those same spots. Either way, your house acts as a refuge from both.

The UGA Extension Integrated Pest Management explains how these extreme weather conditions each affect the cockroach population.

Effects of heavy rains on roaches

Heavy, sustained rainfall floods the burrows, mulch beds and tree holes where outdoor roach species normally live, pushing them toward dry shelter. Heavy rain combined with extreme heat sends roaches and their larger cousins, palmetto bugs, “scurrying for the nearest shelter.”

Smoky brown cockroaches

• Smoky brown is Georgia’s only flying roach species that closely associates with human homes.
• Wetter-than-average months can drive up smoky brown roach activity.
• They pass through houses while migrating tree to tree, especially in neighborhoods with mature hardwoods.

American cockroaches

• American cockroaches are also known as “palmetto bugs” in Georgia.
• They’re among the largest roach species in the state.
• Adults are able to grow over an inch and a half long.
• They prefer damp basements, crawl spaces and sewers.
• They often enter homes, specifically during heavy rain.

Effects of drought on cockroaches

It’s not just excess water; it is also the lack thereof. This means, for roach populations, there’s rarely a “safe” stretch of weather.

• This can cause outdoor harborages like tree holes to dry up.
• Leaky pipes, condensation-prone bathrooms and kitchen sinks become one of the more reliable moisture sources.

Late summer is the worst time for roaches

Regardless of rainfall, roach populations in Georgia tend to peak toward the end of summer and into fall.

• Roaches that have been breeding all season reach maturity.
• They’re looking for mates this time of the year.

How to roach-proof your home

Southern Living says moisture is often the common denominator, so eliminating the moisture source is the most reliable defense.

• Seal entry points like pipes and faucets.
• Wipe down condensation.
• Seal cracks in foundations.
• Repair gaps around plumbing penetrations and floor drains.
• Replace worn caulking around windows and doors.

A single sighting doesn’t necessarily mean an infestation, but repeated sightings can signal a major problem. If roaches keep reappearing, it could mean there’s already a colony living in a wall void.

In that case, you should hire professional pest control. Consult a directory to find a licensed, accredited pest control professional.

This story was originally published July 2, 2026 at 6:00 AM with the headline "Drought and heavy rain draw roaches indoors in GA. Here’s how to keep them out."