This page is about recognition, not DIY instructions. When a condition may be dangerous, stay out of the affected area and contact the appropriate emergency or qualified professional service.
Safety first

Some water-damage situations are unsafe before cleanup even begins.

Water can interact with electricity, sewage, damaged structures, fire conditions, and mechanical systems. Distance is often the safest first response when the hazard cannot be ruled out.

Stop and avoid the area when you observe any of these conditions.

Water near electrical equipment

Standing water near outlets, cords, appliances, service panels, mechanical equipment, or visibly damaged wiring may create an electrical hazard.

Sewage or unknown contamination

Water with sewage, strong odor, visible waste, or an unknown source may contain contaminants. Keep people and animals away.

Structural movement or collapse risk

Sagging ceilings, shifting walls, damaged stairs, bowed surfaces, falling materials, or unusual movement may indicate structural danger.

Fire, smoke, or gas odor

Water damage occurring with fire, smoke, or a suspected gas leak belongs first with emergency responders, not a directory call.

Unsafe access

Dark spaces, submerged steps, unstable flooring, deep water, or blocked exits can make entry hazardous even when the source seems ordinary.

Wet HVAC or mechanical systems

Water affecting furnaces, air handlers, water heaters, or other powered equipment may require a qualified technician before use.

What this guide does not tell you to do

This site does not provide instructions for switching electrical service, entering contaminated water, opening walls, disturbing damaged materials, operating wet equipment, or performing remediation. Those decisions depend on site conditions and qualified professional judgment.