If water is actively spreading through your home right now, start here: shut off the water supply, cut power to any flooded rooms at the breaker, and get people and pets out of standing water. The next 24 hours will determine how much damage you’re left with, and how complicated your insurance claim becomes. This guide walks through exactly what to do, in order, so you’re not guessing while the clock runs.
Step One: Stop the Water and Make the Space Safe
Before anything else, find the source. If a supply line burst under a sink or a washing machine hose failed, you can shut off the angle stop valve right at the fixture. If you can’t isolate it there, or if you don’t know where the water is coming from, go straight to the main shutoff. In most Southern California homes built in the last few decades, that’s at the front of the property near the meter box, usually set into the sidewalk or a small concrete vault at the curb.
Once the water is off, electricity becomes your next concern. Water and live circuits are a serious hazard, and the risk isn’t always obvious, water travels under flooring and through wall cavities, so a room that looks dry at the surface can have saturated insulation touching an outlet box. If any part of the flooded area is near outlets, appliances, or a subpanel, switch off the breakers for those rooms before you walk through them. If the main panel itself is in a flooded area, don’t touch it, call an electrician or your utility provider first.
If the water came from a sewage backup, a toilet overflow, or any source you can’t identify as clean supply water, treat the entire affected area as contaminated. Don’t wade through it, don’t let children or pets near it, and ventilate the space as much as possible.
The First Two Hours: What to Document and Move
Once the space is safe to enter, your phone is your most important tool. Take photos and video of everything before you move a single item, the standing water, the waterline on walls, soaked furniture, damaged flooring, ceiling stains, everything. Insurance adjusters work from documentation, and the more complete your record is at this stage, the smoother the claim process tends to go. Capture timestamps by keeping the date-and-time display visible in your video, or check that your phone’s metadata is recording correctly.
After you’ve documented, start moving what you can:
- Remove portable valuables, electronics, documents, medications, irreplaceable items, to a dry area of the house or a vehicle.
- Lift area rugs and small furniture off wet flooring. Wet rugs left on hardwood or laminate accelerate warping and can transfer dye stains that are nearly impossible to reverse.
- Place aluminum foil or plastic bags under furniture legs that can’t be moved easily. This slows the transfer of tannins and rust from metal hardware into wet flooring.
- Open interior doors and closets in affected rooms to allow air circulation, but keep exterior doors and windows closed if it’s humid outside, Southern California gets marine layer and high-humidity mornings that can work against you.
- Blot (don’t rub) wet upholstery with clean white towels if you want to preserve it, but don’t invest too much effort here before you know the scope of the damage.
If you have a wet/dry shop vac, you can pull standing water off hard floors. This is worth doing, every gallon you remove is less moisture pushing into subfloor and joists. A standard household fan pointed at the wet area is better than nothing, but it won’t reach the moisture inside wall cavities or under flooring.
What Not to Do in the First 24 Hours
Some common instincts make the situation worse. Avoid these:
- Don’t use a regular household vacuum on standing water. It’s a shock hazard and will destroy the motor.
- Don’t run the HVAC system to try to dry things out if you suspect water has reached the ducts or air handler, you risk spreading contaminated moisture or mold spores through the entire system.
- Don’t peel up flooring or open walls yourself unless you have a moisture meter to guide you. Flooring that feels dry on top can be trapping water underneath, and opening walls without knowing where the moisture boundary is can spread the problem.
- Don’t use electric space heaters in wet rooms without confirming the circuits are dry.
- Don’t throw away damaged materials before your insurance adjuster or a restoration professional has seen them. Discarding soaked drywall, flooring, or personal property before it’s documented can complicate your claim.
- Don’t wait to call your insurance company. Most policies require prompt notice of a loss. A quick call to open a claim doesn’t commit you to anything, it starts the clock on your coverage and gets an adjuster assigned.
When the Damage Is Beyond a DIY Response
A small, contained leak, say, a supply line drip caught within an hour under a bathroom sink, might be manageable with thorough drying and a moisture meter check over a few days. But several situations call for a professional restoration crew rather than fans and time:
- The water was running for more than a few hours, or you don’t know how long it ran. Water moves fast through building materials. After several hours, it’s typically behind walls and under subfloor whether you can see it or not.
- The affected area is more than one room, or water has reached a second floor or ceiling below a bathroom.
- The source was a toilet, drain backup, or anything from outside (storm intrusion, irrigation failure). Category 2 and Category 3 water, the industry classifications for gray and black water, carry bacteria and require a different cleanup protocol than clean supply water.
- You can smell a musty or sour odor even after the visible water is gone. That smell is biological activity. In Southern California’s climate, mold can begin colonizing damp building materials within 24 to 48 hours of a moisture event.
- Your flooring is buckled, your drywall is soft, or your ceiling is sagging. These are structural signals that the water has been present long enough to compromise materials.
Professional water damage restoration involves calibrated drying equipment, commercial dehumidifiers and air movers that move far more volume than household fans, as well as moisture meters and thermal imaging to find water that’s hidden inside assemblies. The goal isn’t just surface dryness; it’s getting the moisture content of structural materials back to a range where microbial growth can’t take hold.
The Longer Recovery: What Comes After the First Day
If a restoration crew is involved, the active drying phase typically runs several days, with moisture readings taken at regular intervals to confirm that materials are trending toward acceptable levels. Drywall that absorbed water often needs to be cut out and replaced rather than dried in place, not because it looks bad, but because the paper facing and insulation behind it hold moisture that meters will catch even when the surface seems fine.
Once structural drying is complete and clearance readings are documented, reconstruction can begin: new drywall, flooring, paint, trim, and whatever else the water affected. That scope varies widely depending on how far the water traveled and how quickly the response started.
The first 24 hours matter more than any other window in a water loss. Fast action limits how far moisture migrates, keeps mold from getting a foothold, and gives you the documentation you need to work through insurance without unnecessary friction.
If you’re in the Corona area and the situation is beyond what you can manage on your own, Dry County Restoration handles water damage assessment and restoration, reach them at (951) 667-9910.