5 Most Common Pests During Rainy Season

When the skies open up and the rain starts pouring, it’s not just traffic and muddy floors we have to worry about. Here in the Philippines, the rainy season is also peak time for some of the most common — and troublesome — household pests.

But why exactly do pests show up more when it rains? The answer is simple: water, warmth, and shelter. As floodwaters rise and outside conditions become harsh, pests start looking for a safe, dry, and food-rich environment — like your home.

5 Rainy Season Pests to Watch Out For

1. Mosquitoes

Breeds in stagnant water

Mosquitoes thrive in wet environments, especially where water collects — like flowerpots, gutters, discarded bottles, and even bottle caps. During the rainy season, these breeding spots multiply.

Why it matters: Some mosquitoes carry serious diseases like dengue, which sees a spike in cases during the wet months.

Tip: Regularly empty containers that hold water and consider fogging services for larger infestations.

2. Rats and Mice

Seek shelter from floods and cold

Rodents are highly adaptable. During heavy rain, they leave their burrows and sewers in search of food and dry shelter — and homes, attics, and kitchens are prime targets.

Why it matters: Rats are not just destructive; they carry bacteria and viruses that can cause leptospirosis and food contamination.

Tip: Seal entry points, secure garbage bins, and avoid leaving pet food or leftovers exposed.

3. Cockroaches

Flee flooded drains and pipes

Rain can flush cockroaches out of sewers and into homes. Once inside, they hide in warm, damp spots like under the sink or behind appliances.

Why it matters: Roaches spread bacteria that can cause diarrhea, food poisoning, and even asthma in children.

Tip: Keep drains clean and dry. Don’t leave dishes in the sink overnight.

4. Ants

Relocate their nests indoors

Flooded nests force ants to seek higher, drier ground — often leading them into walls, ceilings, and kitchen areas.

Why it matters: Ants can contaminate food and bring soil into the home. Some species like fire ants may also bite.

Tip: Wipe down counters, seal food in containers, and track down where ants are entering.

5. Termites

Rain accelerates activity

Moisture softens wood and soil, making it easier for termites to tunnel and feed. Though they’re active year-round, termite colonies tend to expand faster when the ground is damp.

Why it matters: Termites are silent destroyers — they can compromise the structural integrity of your home before you even know they’re there.

Tip: Watch for mud tubes, bubbling paint, or hollow-sounding wood. Prevention is cheaper than repair.

Stay Protected This Rainy Season

Rain or shine, pests don’t rest — and neither should your home protection. The rainy season may increase pest activity, but with proper awareness and proactive steps, you can keep your home safe and your family healthy.

At Environet Pest Control, we specialize in protecting Filipino homes and businesses from the very pests that thrive during the tag-ulan. Whether it’s mosquito fogging, rodent baiting, or termite soil treatment, we offer professional solutions that get to the root of the problem.

Ready for a Rainy Season Pest Check?

Book a professional inspection or treatment today!