What to Do in the First Hours After a Flood
I have responded to flood calls in Las Vegas at every hour of the day and night for decades. The homes that come out of it with minimal damage all have one thing in common: the owners acted fast and made the right calls in the first few hours. The homes that turn into major mold and structural repair jobs almost always had a period of waiting, guessing, or attempting DIY mitigation that made the scope larger than it needed to be.
These five tips come from what I actually see on the job. Not general restoration industry advice. What works in Las Vegas homes specifically, with the materials and construction patterns common in this market.
Tip 1: Stop the Water Source Immediately
Before anything else, stop what is causing the water. If it is a plumbing failure, shut off the water supply valve to the affected fixture or shut off the main. If it is monsoon runoff coming through a door or window, do what you can to redirect or block it. If it is a roof failure, contain what you can inside with buckets or plastic sheeting.
This sounds obvious but I have arrived at jobs where the water source was still running when we got there because the homeowner was focused on moving furniture and belongings instead of finding the shutoff. Every minute the source runs is more water in the wall assembly, more water under the flooring, more water in places you cannot see or reach.
Tip 2: Call for Professional Help Before You Try to Dry It Yourself
Call us at (702) 442-1126 before you do anything else. The most expensive mistake I see after flood events is homeowners running fans, opening windows, and using shop vacuums for 24 to 48 hours before calling a professional. The surface dries quickly in the Las Vegas climate. The materials below the surface do not. By the time they call us, the surface is dry, the moisture log shows nothing obvious, and the wall assembly has been sitting at 25% moisture content long enough for mold to begin establishing.
Professional water extraction equipment removes far more water far faster than consumer equipment. Commercial drying equipment is sized to the job. Moisture metering tells us exactly how far water has traveled under flooring and inside walls. That information changes the scope and the timeline. Call first.
Tip 3: Document Everything Before Moving or Removing Anything
Walk through the affected area with your phone and document the water level, the affected surfaces, and the extent of visible damage before you move furniture, remove flooring, or do anything else. Take photos and video. This documentation is what your insurance claim is built on. Adjusters work from what was documented, not from your description of what it looked like before you cleaned it up.
A homeowner in Summerlin had significant flooding in her finished basement from a water heater failure. She moved quickly, removed the wet carpet, and got everything looking reasonable before calling her adjuster. The adjuster documented what was visible at the time of inspection. The claim paid a fraction of what the actual scope required because the extent of damage was no longer visible. Document first. Always.
Tip 4: Do Not Run Box Fans in the Affected Space
Box fans feel like they are helping because they move air. What they actually do is spread moisture laterally into adjacent materials and adjacent rooms. A flood that wet one room and was then fanned for 48 hours often produces moisture readings in two or three adjacent rooms that were not part of the original event. That lateral spread increases the scope of what needs to be dried and the length of the drying period.
Turn the HVAC system to fan-only and let it run if you want to improve air circulation. Do not point fans at wet walls, floors, or ceilings. Professional drying equipment is directional and pressure-controlled for a reason. Uncontrolled airflow in a wet space makes the situation worse.
Tip 5: Act Within the First 24 Hours
Mold begins establishing in wet materials within 24 to 48 hours under the right conditions. Las Vegas summer heat accelerates this timeline inside homes that are not air-conditioned or that have been unoccupied. A job called in within two hours of a water event and extracted while materials are still at surface saturation typically resolves in three to five days of drying. The same job called in 72 hours later, after surface drying has occurred and moisture has penetrated deep into the assembly, may take seven to ten days and may require mold remediation on top of structural drying.
The cost difference between acting in hour one and acting in day three is significant. Our team responds within one hour anywhere in the valley, 24 hours a day. If you have water in your home right now, call (702) 442-1126. Read more about our water damage restoration service and the typical restoration timeline so you know what to expect when we arrive.