What should I do if my basement floods?

Do not enter standing water that may contact electrical equipment. Cut power safely from outside the affected area, stop the water source if you can reach it safely, then photograph everything before cleanup.

Last reviewed 2026-07-15

Water contacting outlets, appliances or a panel is an electrocution hazard. If the panel itself is in the flooded area, call the utility or an electrician rather than approaching it.

Once safe, source control matters: a supply failure needs the main shutoff, while groundwater or sewer backup needs different handling and different insurance treatment.

What to check first

  • Whether water is near outlets, appliances or the electrical panel
  • Whether the source is supply plumbing, groundwater, or a sewer backup
  • Sump pump operation and power supply
  • Whether the water is contaminated — sewer backup requires professional cleanup

When to call a professional

  • Water is in contact with electrical equipment
  • The water is or may be sewage
  • The source is not identifiable, or water continues to enter