What Is Post-Wildfire Flooding and Why Is It Dangerous?

After a wildfire, the heat can bake the soil, creating a waxy layer that blocks water from soaking in. Plants that once held the ground together are gone, so the soil becomes loose and easily moved. When rain falls, it beads up and runs off the surface instead of absorbing.

This runoff gathers speed and volume quickly. Even a moderate rainstorm can produce a sudden surge of water, mud, and ash. The burned landscape acts like a slick pavement, directing water into channels, creeks, and low areas where homes may sit.

If you live in an area recently affected by wildfire, take steps before rain is forecast. Clear gutters and downspouts of ash and debris so water can flow away from your roof. Move valuables and important documents to upper floors if your home is in a flood-prone zone.

Keep sandbags or plastic sheeting on hand to divert water from doorways and low openings. Know where your main water shutoff valve is and how to turn it off. Have an emergency kit ready with flashlights, batteries, and first aid supplies.

Once the flood recedes, safety comes first. Wear gloves, boots, and a mask when cleaning up because the mud and ash can be irritating. Remove soaked carpets, drywall, and insulation that cannot be dried quickly to prevent mold growth.

Water damage from flooding often requires professional help to dry the structure properly. Local water damage pros can assess the extent of the damage and use equipment to dry out your home. They can also help with repairs to flooring and drywall that were damaged by the water.

Bullets

Do not re-enter your home until officials say it is safe

Photograph all damage for your insurance records

Throw out food that came into contact with floodwater

Wash your hands thoroughly after handling debris

Dry wet areas within 48 hours to reduce mold risk