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What to Do in the First 24 Hours After Water Damage

Published by the water-damage-restoration-san-antonio.net editorial team • Published August 5, 2026 • Updated August 5, 2026

The short version: stop the water, stay safe around electricity, photograph everything before you move it, call your insurer and a restoration crew within the first few hours, and get standing water out the same day. In San Antonio's humidity, mold can establish on wet drywall within 24–48 hours — so the first day decides whether this is a dry-out or a demolition.

Hour 0–1: Stop and Make Safe

How Texas policies treat water depending on how it got loose Decision diagram. Starting question: how did the water get loose? Four outcomes. Sudden and accidental events such as a burst pipe or failed water heater are typically covered by a homeowners policy. Gradual leaks and poor maintenance are typically excluded. Water backing up through sewers or drains usually requires a separate water backup endorsement. Rising water from outside is always excluded from homeowners policies and requires flood insurance. The question that decides most Texas water claims How did the water get loose? Sudden and accidental burst pipe failed water heater appliance blowout USUALLY COVERED Gradual or maintenance slow seep for months chronic roof leak deferred repairs USUALLY EXCLUDED Backed up through a sewer or drain sewage backup blocked lateral surcharged main NEEDS A WATER BACKUP ENDORSEMENT Rising water from outside flash flooding creek or river rise street runoff NEVER ON A HOME POLICY — NEEDS FLOOD This is why photographing how the water entered matters before anything is cleaned up. General guidance only — your policy wording controls. Confirm with your insurer.
  1. Stop the water at its source. Fixture valve first if it's a toilet or sink line. Otherwise shut the main: in most San Antonio homes it's in a ground-level box near the curb (a meter key or pliers opens the lid) or a cutoff by the front hose bib.
  2. Respect electricity. Don't step into water that could be touching outlets, power strips, or appliances. If water is near the breaker panel, stay out and say so when you call for help.
  3. Don't walk under bulging ceilings. Waterlogged drywall collapses without much warning.
  4. If it's sewage or outdoor floodwater, keep everyone out. That's contaminated Category 3 water — different rules, covered in our categories guide.

Hour 1–3: Document, Then Protect

  1. Photograph and video everything before touching it. Wide shots of each room, close-ups of damage, the water source, and standing-water depth (shoot against a ruler or a door frame). Claims go smoother when the “before” is undeniable.
  2. Call your insurance company to open the claim and ask two questions: what's my deductible, and do you need anything before mitigation starts? Texas policies require you to take reasonable steps to prevent further damage — waiting can hurt the claim.
  3. Call a restoration crew. Extraction the same day is the single highest-leverage move; see emergency water removal. One call to (210) 555-0199 connects you with a licensed local pro, 24/7.
  4. Move what matters. Electronics, documents, photos up and out. Furniture legs onto foil or blocks. Rugs off wet floors — their dyes stain carpet fast.

Hour 3–24: Get the Water Out and the Drying Started

  • Extraction beats evaporation. Every gallon physically removed is a gallon that doesn't have to dry out of your walls over days.
  • Don't rely on ceiling fans and open windows. For most of the year San Antonio's outdoor air is too humid to dry a house — it can even add moisture. Machine drying with dehumidifiers is what works here; the structural drying page explains why.
  • Be careful with the A/C. If ducts or returns took water, running the system spreads humid, dirty air through the house.
  • Keep receipts for everything — fans you buy, a night in a hotel, tarps. Reasonable mitigation costs are typically claimable.

What NOT to Do

  • Don't use a household vacuum on water — electrocution risk.
  • Don't paint or caulk over damp material to “seal” it — you're bottling the moisture in with the framing.
  • Don't throw damaged items away before the adjuster sees them (or at minimum, photographs and an itemized list).
  • Don't assume “it looks dry” means it is — drywall cores and slab concrete hold water long after surfaces feel dry.

Why the Clock Is Faster in San Antonio

The EPA's guidance is to dry water-damaged materials within 24–48 hours to prevent mold — and that window assumes average conditions. San Antonio's warm temperatures and Gulf humidity sit at the fast end of it. Our mold timeline guide maps what happens if the window is missed.

Sources

In the middle of it right now? Skip the reading — call (210) 555-0199 and get extraction moving. The rest of this guide will still be here.

Related Guides

First 24 Hours FAQs

Should I shut off the electricity myself after water damage?

Only if you can reach the breaker panel without standing in or touching water. If the panel is in the affected area, or if water is anywhere near it, leave it alone and tell the crew when you call — that is one of the first things they check on arrival. Turning off power to affected rooms is worthwhile where it is safe, because water reaches outlets and light fixtures long before it looks like it has.

Can I pull up wet carpet before the crew arrives?

Lifting a corner to get air underneath is fine. Pulling the whole thing up usually is not worth it — saturated carpet is extremely heavy, the pad underneath will most likely be discarded anyway, and dragging it around spreads water into dry areas. If the water is sewage or came in from outside, do not handle it at all: that is Category 3 water and needs protective equipment.

What exactly should I photograph for the insurance claim?

Wide shots of every affected room before anything is moved, close-ups of damaged materials and contents, the source of the water if you can see it, and the depth of standing water against a fixed reference such as a door frame. Photograph serial numbers on damaged appliances too. Keep receipts for anything you buy to limit the damage — reasonable mitigation costs are typically claimable.

Do we need to move out of the house while it dries?

Usually not for a contained clean-water loss. Drying equipment is loud and warm, but the house generally stays habitable. Moving out makes sense if the loss involved sewage or floodwater, if equipment blocks the only bathroom or kitchen, or if someone in the household has asthma or is immunocompromised. If your policy includes loss-of-use coverage, temporary accommodation may be reimbursable — ask your adjuster before booking anything.

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