Texas scorpions are most active from late spring through early fall, with activity peaking in July and August when heat and dry conditions drive them to seek water, shelter, and prey. Getting rid of them requires a combination of sealing your home, reducing the habitat around it, targeted chemical treatment, and ongoing detection. Here’s how to tackle each step.
When Scorpions Are Most Active in Texas
Scorpions start emerging in spring once daytime temperatures climb into the mid-80s to 90s. Activity ramps up through summer and peaks in July and August, when it’s hottest and driest. As long as nighttime temperatures stay around 76°F or higher, scorpions remain active after dark, hunting insects. This means your control efforts matter most from May through September, though scorpions can show up indoors year-round as they seek moisture or warmth.
The most common species you’ll encounter is the striped bark scorpion, found across most of the state. It’s small (2 to 3 inches), pale tan with two dark stripes down the back, and an excellent climber. Unlike ground-dwelling species, bark scorpions can scale stucco, brick, and rough siding, which makes sealing upper entry points just as important as ground-level ones.
Seal Your Home’s Entry Points
Exclusion is the single most effective long-term strategy. Scorpions can squeeze through gaps as narrow as a credit card, so a thorough inspection of your home’s exterior is essential. Focus on these areas:
- Weep holes. Brick homes in Texas have weep holes along the base of exterior walls for moisture drainage. Don’t caulk these shut. Instead, insert copper mesh or fine stainless steel mesh screens that block scorpions while still allowing airflow and drainage. This preserves the hole’s function while eliminating a major entry route.
- Door sweeps and thresholds. Gaps under exterior doors are one of the most common entry points. Install tight-fitting door sweeps on every exterior door, including the garage. Check that weatherstripping on the sides and top of the door frame has no visible daylight gaps.
- Cracks and gaps in the foundation. Use caulk or expanding foam to seal unintended cracks in the foundation, around pipe penetrations, where utility lines enter the house, and along window frames. Caulk works well on these non-functional gaps where you don’t need to preserve drainage.
- Roof and eave gaps. Because bark scorpions climb, check where the roofline meets the wall, around soffit vents, and at any gaps in eave construction. Seal with caulk or mesh as appropriate.
A full exclusion job can take a weekend for a typical house. Walk the entire perimeter slowly, checking every seam and penetration. Inside, look at where baseboards meet the floor, around plumbing under sinks, and at gaps where recessed lighting or ceiling fans enter the attic space.
Reduce Scorpion Habitat Around Your Yard
Scorpions shelter during the day in cool, dark, moist spots. The more of these you eliminate near your home, the fewer scorpions will be close enough to wander inside. Clear woodpiles, stacked lumber, landscaping stones, and leaf litter away from the foundation. Keep firewood stored at least 20 feet from the house and elevated off the ground.
Trim tree branches and shrubs so they don’t touch the exterior walls or roof, since bark scorpions use these as bridges. Reduce ground cover plants like ivy near the foundation. Fix leaky outdoor faucets and irrigation lines, because standing moisture attracts both scorpions and the insects they eat. Outdoor lighting draws bugs, which in turn draws scorpions, so consider switching porch lights to yellow or amber bulbs that attract fewer insects, or move lights away from doors to pull the insect swarm away from entry points.
Chemical Treatments That Work
Pesticides alone won’t solve a scorpion problem, but targeted chemical treatment combined with exclusion and habitat reduction can significantly cut their numbers. Research on bark scorpions shows that crack and crevice treatments in known harborage areas are highly effective. Applying a microencapsulated pyrethroid along foundation bases, into weep-screed crevices, and inside gaps in block walls produces lethal effects on scorpions within about 12 hours of contact.
One important detail: surface type matters. Porous materials like concrete, sand, and stone absorb some of the pesticide into the substrate, reducing how much active ingredient scorpions pick up. Smooth, non-porous surfaces like tile retain more of the chemical on the surface where scorpions contact it. This means perimeter treatments on rough concrete foundations may need more frequent reapplication than treatments on smoother surfaces.
For DIY treatment, look for residual pyrethroid sprays labeled for scorpions at home improvement stores. Apply them as a perimeter band around the foundation exterior and in cracks and crevices where scorpions hide. Reapply every 4 to 6 weeks during peak season. Dust formulations work well in wall voids, attic spaces, and other enclosed areas where liquid sprays are impractical. If you’re dealing with a heavy infestation, a licensed pest control company can apply professional-grade products in hard-to-reach harborage areas that DIY treatments miss.
Hunt Scorpions at Night With a UV Light
Scorpion exoskeletons contain fluorescent proteins that glow bright blue-green under ultraviolet light, making them easy to spot in the dark. A UV flashlight in the 365nm range is the sweet spot for detection. Decent models cost $20 to $40 and last for years.
Scorpions are most active one to two hours after sunset, especially once temperatures drop below 85°F. Grab your UV light and a pair of 12-inch tongs (never pick up a scorpion with your hands) and walk your property. Outside, focus along block wall bases, foundation lines, and the edges of walkways. Inside, check along baseboards, door frames, and where furniture meets walls. These are the travel routes scorpions follow.
Regular night patrols serve two purposes. They reduce the active population around your home, and they show you exactly where scorpions are entering and congregating, which tells you where your exclusion work or chemical treatment needs attention. Even one or two patrols a week during peak season can make a noticeable difference.
Using Sticky Traps for Ongoing Monitoring
Glue board traps placed along walls catch more scorpions than traps set in open floor space, because scorpions travel along edges rather than crossing open areas. Place them along interior baseboards, in closets, in the garage, and near known entry points. Check traps regularly.
A trapped scorpion can still sting you even if it looks motionless. Subtle movement in the tail or legs can be hard to notice, and accidental contact with the stinger can puncture skin. Keep traps away from children and pets, and dispose of them carefully using tongs or by folding the trap closed.
Sticky traps won’t eliminate an infestation on their own, but they’re a useful early warning system. If you’re catching scorpions on a particular trap repeatedly, that tells you there’s an entry point or harborage nearby that needs attention.
What to Do if You Get Stung
Striped bark scorpion stings are painful but rarely dangerous for healthy adults. The sting typically causes immediate sharp pain at the site, sometimes with numbness or tingling that can spread along the limb. Reactions vary from person to person.
Clean the area with mild soap and water, apply a cool compress, and take an over-the-counter pain reliever like ibuprofen. Rest the affected limb in a comfortable position. Don’t try to suck the venom out or cut the skin around the sting. Avoid sedatives or anti-anxiety medications, which can mask worsening symptoms.
If a child is stung, contact Poison Help at 800-222-1222 right away. Children are more vulnerable to venom effects. For adults, difficulty swallowing, blurred vision, muscle twitching, or symptoms that worsen over the first hour are signs to seek medical attention. Severe cases may require hospital treatment, including antivenom for serious reactions in children or adults.
Make sure your tetanus vaccination is current, as any puncture wound carries a small risk of tetanus infection.