Emergency guide

Sump pump failed and the basement is flooding: what to do

A sump pump usually fails at the worst time: during heavy rain, snowmelt, or a power outage. Here is a calm order of operations.

1. Safety first

• If water is near outlets, cords, the furnace, or the electrical panel, do not walk into it. Shut off power to the basement at the panel only if you can reach the panel while standing somewhere dry. Otherwise call your electric utility.
• If you smell gas, leave and call your gas utility or 911 from outside.

2. Quick checks (only if it’s safe)

• Power: is the pump plugged in, and has a GFCI outlet or breaker tripped? Many failures are power outages.
• Float switch: the float can stick against the pit wall. Freeing it sometimes restarts the pump.
• Discharge line: in winter, a frozen or clogged outdoor discharge line can stop the pump from moving water.
• Running but not pumping: a humming pump that moves no water may have a jammed impeller or failed check valve. That needs a repair or replacement.

3. Limit the damage

• Move valuables, boxes, and electronics off the floor.
• Take photos and video of the water and damaged items before cleanup, for insurance. See our water damage claim guide.
• Standard homeowners policies often exclude sump backup unless you added a water-backup endorsement. Check your policy before assuming coverage.

4. When to call for help

Call when water keeps rising, has reached drywall, carpet, or the furnace, or has been sitting more than a few hours. Wet materials can start growing mold within about 24–48 hours, so drying quickly matters. Call (317) 953-9223 and we’ll connect you with an independent local water damage provider. You only pay them for work you approve.

Related: First 60 minutes after water damage · Prevent burst pipes · Thaw a frozen pipe safely