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Need Water Removal or Flood Cleanup in Harlingen, TX?

Three things put water in Harlingen homes. The Arroyo Colorado runs straight through town, and heavy rain sends it over its banks, most recently in the March 2025 storm that pushed the arroyo to a record crest and flooded hundreds of houses. Slab leaks are the quieter problem, driven by the Harlingen clay series underfoot, an expansive soil that swells and shrinks with the seasons and puts real stress on the slabs nearly every home here is built on. Hurricane rainfall is the third, and this city sits close enough to the Gulf that storms like Dolly have flooded it before. We answer all three with advanced extraction equipment, structural drying, and documented moisture readings, backed by 65-plus years of ServiceMaster experience.

Water damage in your Harlingen home? Call ServiceMaster Recovery by H&M anytime. We're here 24/7.

leaky slab in a home in The Woodlands

Slab Leak Water Damage Restoration

Here's what makes Harlingen unusual. The soil beneath the city is the Harlingen clay series, named for this place because this is where it was first classified, and it has an exceptionally high capacity to swell when wet and shrink when dry. The Arroyo Colorado complicates it further by acting as a wick. Soil within about a half-mile of the channel stays damp even through drought, while soil a few blocks inland can dry out and crack several inches deep. That difference from one side of a lot to the other is what tilts a slab unevenly, and it's a familiar story in Dixieland, downtown, and Treasure Hills.

Movement isn't the only mechanism. The area's sodium-rich soil, left behind by ancient marine deposits, keeps electrical resistivity low, which corrodes unprotected buried metal pipe faster than it would elsewhere. So the ground shifts the pipe and the chemistry eats at it. Our crews use moisture detection to trace water beneath slab flooring, coordinate with plumbers to pin the leak source, and run drying protocols built specifically for slab-on-grade construction, where the water has nowhere to go but into the concrete and up.

Hurricane & Arroyo Colorado Flood Cleanup

Flooding in Harlingen arrives fast and leaves slowly. Roughly 27 inches of rain falls here in a typical year, but it comes in bursts between June and October, saturating clay soil that can't absorb it and then draining sluggishly across flat ground. March 2025 broke every benchmark, with more than 21 inches overnight and the Arroyo Colorado cresting at 30.44 feet, well past the 24.22-foot record from 2010. The pattern repeats: the Great June Flood of 2018, another in 2019, Hurricane Hanna in 2020, Dolly before that. Arroyo floodwater carries sediment and debris, so we handle it as contaminated water, with rapid extraction, proper removal and disinfection, and drying scaled to a regional event.

water restoration
leaky water heater

Burst Pipe & Water Heater Damage Restoration

Not every leak comes from the slab. Supply lines fail, water heaters give out, and connections behind walls let go, and older homes near downtown have plumbing that's been patched across decades of ownership. The same corrosive soil chemistry that attacks pipe beneath a slab works on buried service lines too. When a line breaks, water spreads across a flat slab floor and into cabinetry and wall bases before most people notice a problem. Our crews walk you through emergency shutoff, extract the water, and dry the structure while checking for moisture that traveled further than the visible wet edge suggests.

Why Choose ServiceMaster Recovery by H&M for Water Damage Cleanup or Restoration

Water problems in Harlingen tend to hide and finding them is most of the work.

Response at any hour

Arroyo flooding and hurricane rain both escalate quickly, and every hour standing water sits, it climbs further into materials that were dry when the storm started.

Handling for contaminated floodwater

Water from the arroyo brings sediment and contaminants with it. Our technicians are trained to remove and disinfect it properly rather than treat it like a clean-water spill.

Equipment that finds what's hidden

Harlingen's heat and humidity can evaporate the surface evidence of a slab leak while the damage continues below, and storm flooding demands high-capacity extraction. Both call for commercial-grade tools, not a rented fan.

Documentation your adjuster will use

Slab leak and flood claims turn on proof. We record moisture readings and photographs from the first visit, which matters most when the damage is underneath the floor and invisible in a walkthrough.

Why Water Damage Can't Wait in Harlingen Homes

A slab leak gives you almost no warning. The water has nowhere to go but into the soil and up through the concrete, so by the time you see it, it has usually been running a while.

Within hours: Water from a slab leak or a broken pipe starts saturating subfloor materials and flooring with nothing showing on the surface, because the source sits under the concrete where you can't look.

Within days: A leak left running feeds moisture into soil that already swells and shrinks, worsening the uneven settlement Harlingen slabs are prone to. Now you have foundation movement layered on top of water damage.

Within weeks: Trapped moisture in enclosed spaces turns into mold in this heat and humidity, and plenty of homeowners only learn about the leak after months of water bills they couldn't explain.

Every week a hidden leak runs, the repair gets bigger and the list of what can be saved gets shorter.

What to Do Immediately After Water Damage in Your Harlingen Home

  1. 1
    Step 1
    Cut the water off if you can find the source

    For a suspected slab leak, close the main shutoff. If the water is coming from the arroyo or a storm outside, leave it alone and get yourself somewhere safe.

  2. 2
    Step 2
    Look for the signs of a hidden leak

    Unexplained spikes in your water bill, warm patches on the floor, or the sound of running water when nothing is on all point to a slab leak.

  3. 3
    Step 3
    Photograph everything before you move it

    Video and photos of the affected rooms and belongings, taken before cleanup, give your insurance claim the foundation it needs.

  4. 4
    Step 4
    Call ServiceMaster Recovery by H&M

    Once you're safe and the damage is recorded, reach out for 24/7 emergency water removal and drying.

When to Call for Professional Water Damage Restoration in Harlingen

Slab leaks and arroyo flooding both punish delay, so if you need water damage restoration in Harlingen, call ServiceMaster Recovery by H&M. We're available 24/7 for emergency water removal, storm damage cleanup, slab leak detection and drying, and full flood damage restoration, from the first extraction through the last repair. One call gets a crew moving toward your home.

Get the help you deserve

We’re available 24/7 to discuss your restoration needs.