Why Rat Infestations Are on the Rise and How to Stop Them

Rising temperatures are driving rat populations to surge globally, affecting both major cities and smaller towns. A study published in Science Advances shows that cities like Washington, D.C., New York, and San Francisco are reporting increased infestations. Even places like New Orleans and Louisville, KY, are not immune.

Biologist Jonathan Richardson points to longer warm seasons as a key reason, for allowing rats to extend their breeding cycles.

"If winter starts a week or two later and spring arrives earlier, that’s one, two, maybe even three or four weeks where those rats can be above ground foraging," he explains (Gill, 2025).

Rat problems are no longer limited to urban areas. Jim Fredericks, chief entomologist for the National Pest Management Association, says,

 "They are definitely seeking food in places where they haven’t previously," meaning suburban and rural homes are at risk too (Gill, 2025).

How to Tell If Rats Are in Your Home

Here are common signs of a rodent invasion:

• Droppings – Rat droppings often appear near food sources or in hidden corners.
• Chewed Areas – Look for damage on walls, wires, furniture, or food packaging.
• Burrowing Points – Entry points around foundations, flower beds, or even near attics in warmer climates.

Even if you haven’t seen a rat, these warning signs should prompt a closer inspection.

How to Prevent Rats from Invading Your Home

You can prevent a rat problem by following these key steps:

1. Seal Entry Points – Rats can squeeze through quarter-sized holes and mice through dime-sized openings. Focus on doors, windows, pipes, vents, and cables.

2. Secure Food Sources – Store food in sealed containers, use sturdy garbage bins, and remove pet food from accessible areas. Fredericks cautions, "Plastic bags holding garbage are just like wrapping paper to rats."

3. Regular Inspections – Sweep your home weekly to look for new signs of rodents. Inspect your property for burrowing spots, particularly in vulnerable areas such as flower beds or near overhanging tree branches. Michael Parsons, a research scholar, advises,

"Think like a rodent—where would you enter if you weighed 400 grams? (Gill, 2025)."

When to Call a Pest Control Professional

While DIY prevention works for small risks, major infestations may require expert help. Pest control professionals offer a thorough evaluation of entry points, apply humane extermination methods, and ensure long-term protection.

"It’s not just about setting out mousetraps," Fredericks emphasizes (Gill, 2025).

Bottomline

Rat infestations are becoming more common worldwide due to climate shifts. Protect your home by inspecting for warning signs, sealing entry points, and securing food sources. If you already have a rat problem, don’t hesitate to call in professionals to eliminate the issue safely and thoroughly.

If you are considering a move to a new home in Orange County, let's connect! I can help you find the perfect rodent-free home to meet your needs.

Reference: Gill, K. (2025, February 3). Rats Are Infesting More Homes Than Ever—Here’s How You Can Keep Them Out. AP News.