What to Do in the First 48 Hours After a Flood or Water Damage in Houston

First 24–48 hours: what to do, in order

1. Make sure it is safe before doing anything else. If water is near outlets, electrical panels, or appliances, or may be contaminated by sewage or outside floodwater, do not enter the area. Call a professional.
2. Stop the water source if you can do so safely. For a plumbing failure, shut off the main water valve. For storm or flood water, move on to the next step.
3. Photograph and document the damage before moving or discarding anything. Take wide room photos, close-ups of damaged materials, and note the date and time for your insurance records.
4. Call your insurer or agent once it is safe. Ask what documentation is needed and whether this event is covered. Standard homeowners policies generally do not cover flooding, which often requires separate flood coverage.
5. Remove standing water as soon as possible. Use a mop, wet/dry vacuum, or a pump for larger volumes when it is safe to do so.
6. Begin active drying within 24–48 hours. Use fans, a dehumidifier, and air circulation. In Houston’s humid weather, opening windows may not help if outdoor humidity is higher than indoors.
7. Remove porous materials that cannot be fully dried. Soaked carpet padding, drywall, and insulation can hold moisture where mold may be hard to remove later.
8. Reassess at the 24–48 hour mark. If materials remain wet, warning signs are developing, or any professional-help factor below applies, arrange an assessment instead of waiting.

Do this and do not do this

Should you handle it yourself or call a professional?

Use this as a decision guide, not a single-rule test. The size of any visible mold area is only one factor. Water source, how long materials stayed wet, hidden moisture, affected materials, HVAC involvement, and household health needs also matter. If your mold didn’t follow a recent flood or water event, our DIY vs. professional decision guide covers that broader situation in more depth.

Warning signs that mold or hidden moisture may be developing

• A new musty or earthy smell in the affected room.
• Staining, discoloration, or fuzzy/speckled growth on walls, baseboards, or ceilings.
• Bubbling, peeling, or cracking paint or wallpaper.
• Warping, buckling, or soft flooring near where water pooled.
• Persistent dampness or condensation days after the event.
• Allergy-type symptoms that become more noticeable in one affected area.
• A wall, floor, or smell that stays damp or returns after the original event.

If mold has appeared or hidden moisture is suspected, learn about mold inspection in Houston. If you specifically need to decide whether sampling is appropriate, see mold testing in Houston.

Houston-specific drying and insurance considerations

• Humidity changes the drying approach. In Houston, outdoor humidity is often high, so dehumidification and air conditioning may be more useful than opening windows.
• Storm and flood exposure recur here. Heavy rain, tropical systems, bayou-adjacent housing, and flood-plain exposure make rapid documentation and drying especially important.
• Check the flood distinction with your insurer. Standard homeowners insurance generally does not cover flooding; flood coverage is commonly separate. Ask your insurer or agent about your own policy and documentation requirements.

Frequently asked questions