A sudden leak can make every decision feel urgent. Put safety and the source first, then document what happened before the room changes. This checklist is for common indoor leaks; rising floodwater or sewage requires additional precautions.
There is no universal order when a building is unsafe. If there is a risk of electrocution, a damaged structure, gas or another immediate hazard, leave the area and contact emergency services or your utility.
First: keep people out of danger
Do not walk through water to reach a breaker, outlet or appliance. If electricity is involved, turn it off only from a safe, dry location or ask the utility or a licensed electrician for help. Keep children and pets away from the wet area. If the water came from outside or a drain, treat it as potentially contaminated.
Next: stop what is feeding the leak
For an accessible fixture or appliance, shut off its supply valve if doing so is safe. If a pipe has failed and you know where the main water valve is, use it from a dry, safe location. If you cannot identify the valve, contact a plumber or water utility. Stopping the source may prevent the damage footprint from growing while you plan the cleanup.
Then: make a record before cleanup changes the scene
Take wide photographs of every affected room and close-ups of wet walls, floors and belongings. Record the time you discovered the problem, the suspected source and whether water reached electrical items. Photograph serial numbers of damaged appliances if accessible. Keep a simple log of calls, instructions and money spent on emergency measures.
- Do not delay a necessary safety action just to take a photo.
- Save receipts for emergency drying, lodging and repairs.
- Ask your insurer how to preserve evidence before disposing of materials.
Finally: ask how drying will be measured
Removing puddles is only a beginning. Wet drywall, cabinet bases and subfloors may require a moisture assessment. Ask the person evaluating the property how they will identify concealed moisture, whether materials can be saved and what documentation you will receive. The EPA recommends drying water-damaged items and areas within 24–48 hours when possible to reduce mold risk; that is a prompt to act, not a promise that every structure dries that fast.