The First 10 Minutes After a Pipe Bursts in Your California Home

A burst supply line dumps roughly 8 to 12 gallons per minute. If you've just watched water spray out of a fitting or heard the unmistakable hiss of a pinhole under the slab, the next 600 seconds matter more than anything that happens later in the cleanup.

Shut off the main water valve

The main shut-off is usually on the street side of your house, sometimes in a box near the sidewalk. Older Long Beach and Pasadena homes have it in the basement or crawl space. If you've never used it, the handle may be stuck — turn it slowly clockwise. If it won't budge, call your water utility's after-hours line. Most California water districts dispatch within 30 to 60 minutes.

Cut power to wet rooms

From the breaker panel only. Never reach into a flooded room to flip a switch. Water and electricity behave predictably when they meet, and the prediction is bad.

Start photographing

Wide shots of every affected room. Close-ups of the leak source. The standing water at floor level. Damaged contents before you move them. Time-stamped phone photos are admissible insurance evidence — restoration contractors will tell you the same thing. The CalFire / Cal OES state emergency office recommends documenting in this order.

Move what you can save

Wood furniture absorbs water through the legs upward. Lift it onto blocks, books, or aluminum foil packets. Electronics go to a dry room immediately. Anything you've moved should be photographed in its new location too.

When the arrives

If you've called a restoration crew, they bring truck-mounted extractors that pull 50 to 100 gallons per minute. The first phase is water removal, then they set up air movers and desiccant dehumidifiers in calculated grid patterns. The math behind drying is published in IICRC S500, the industry standard.