The First 24 Hours After Water Damage: What To Do (And What Not To)

Water damage is a clock, not an event. What happens in the first 24 hours determines whether you're looking at a few days of drying equipment or weeks of demolition and rebuild. Here's how to use those hours well.

Do these first

Stop the source if you safely can — the supply valve behind the toilet, the washing machine shutoff, or the main. Kill power to affected rooms at the breaker if water is near outlets. Then take photos and video of everything before you move a single item; your insurance adjuster needs the scene, not the cleanup.

Call before you rip

The biggest first-day mistake is tearing out wet materials before anyone documents moisture levels. Restoration pros map what's wet with meters and thermal imaging — that map becomes the backbone of your insurance claim. Rip first and you're negotiating from memory.

What not to do

Don't run a shop vac near live outlets. Don't crank the AC to 'dry things out' — it can spread humidity through the duct system. And don't trust 'it feels dry.' Drywall and base plates hold moisture for weeks after the surface feels fine, and that hidden moisture is exactly where mold starts.

Fast, documented response is cheaper — usually dramatically cheaper — than a slow one. If you're staring at standing water right now, make the call first and start moving furniture second.