Houston has an ant problem that most of the country doesn't. And heading into spring twenty twenty-six, it's getting harder to ignore.
Six species regularly show up in Houston homes. Several of them can't be eliminated with anything sold at a hardware store. And some of them — like tawny crazy ants — are actively causing electrical failures in homes across Harris County right now.
Here's what's happening and what actually works.
First, the climate. Houston's subtropical weather means ant colonies almost never go fully dormant. Activity slows in December and January, but it doesn't stop. By February, fire ants are already building new mounds after the first warm rain. By March, multiple species are in full foraging mode. The pest season here runs almost without interruption, which is why the same yards and the same kitchens keep seeing the same problems year after year.
The two windows that matter most are spring — March through May — and fall — September through October. Spring is when fire ant colonies surge and indoor species start pushing through gaps in foundations and weatherstripping. Fall is actually the better time to treat fire ants, because foraging peaks between seventy and eighty-five degrees, and bait treatments are significantly more effective at those temperatures than anything applied in summer heat.
Most homeowners treat in summer. That's the least effective time. It's one of the main reasons the same yards get re-treated every year.
Now, tawny crazy ants. This is the species ABC Home and Commercial Services is most concerned about heading into spring twenty twenty-six. Tawny crazy ants — scientific name Nylanderia fulva — first appeared in Harris County in two thousand two and have been expanding ever since. They don't sting. What they do is damage electronics.
These ants are drawn to electrical equipment — HVAC systems, junction boxes, circuit breakers, appliances. They pack into it in such dense numbers that they cause short circuits and failures. This problem has been serious enough that NASA facilities in the Houston area have had to deal with it directly. A single colony nesting behind a wall panel or inside an appliance has cost Houston homeowners thousands of dollars in repairs.
The other problem is that standard consumer insecticides don't work on this species. This isn't a matter of applying more product or a different formulation. Tawny crazy ants are resistant across their range. If fast-moving ants in erratic, irregular trails are appearing near electronics or electrical systems, the only reliable move is professional treatment. Store products will not hold.
The species identification problem applies to every ant in Houston, not just tawny crazy ants. Pharaoh ants — tiny, pale yellow ants that nest inside wall voids — split into multiple sub-colonies when sprayed. That behavior is called budding, and it turns a contained infestation into a scattered one. Carpenter ants require a completely different approach than fire ants. Treating the wrong species with the wrong product wastes money and can make the infestation significantly worse.
For fire ants, the most effective homeowner-level approach is the Texas A and M Two-Step Method developed by AgriLife Extension. Step one is broadcasting bait across the entire yard — not just treating visible mounds. Step two is a follow-up mound drench on the largest colonies. Applied in spring or fall at the right temperatures, this approach is more complete and less toxic than mound-only contact treatments.
For indoor species, slow-acting bait reaches the queen through feeding behavior and eliminates the reproductive source. A trail that disappears after spraying hasn't been controlled. It's moved.
When should homeowners stop trying to handle it alone? When tawny crazy ants are confirmed. When pharaoh ants are established indoors. When fire ant mounds keep returning. When carpenter ants appear near wood damage. When any infestation is inside walls or inaccessible voids.
According to Texas A and M AgriLife research, fire ants alone cost Texas one point two billion dollars annually. That number reflects what happens when the wrong treatment gets applied to the wrong pest — repeatedly.
ABC Home and Commercial Services has been protecting Houston homes since nineteen eighty-six. For species-specific ant control across Harris County, visit abc home and commercial dot com slash houston slash pest-control slash ant-control.
ABC Home & Commercial Services Houston
City: Cypress
Address: 11934 Barker Cypress Rd
Website: https://www.abchomeandcommercial.com/houston