Everything you should do to prepare during a flash flood warning

Flash floods are one of the most dangerous natural disasters because they often occur without any warning.

These sudden floods can cause devastating damage and put lives at risk, and preparation is essential.

Here’s how to prepare before, during, and after a flash flood.

Understand Your Risk

The first step in flood preparedness is knowing your area’s vulnerability. Use tools like FEMA’s Flood Map Service Center to identify flood zones near your home.

However, floods can happen almost anywhere it rains, so don’t assume you’re safe outside marked areas.

“It’s important that everyone understands that where it can rain, it can flood,” a spokesperson for FEMA told Newsweek in an email. “Flash floods —particularly common after wildfires—can be especially dangerous as they may occur within minutes after the onset of a rainstorm.

“Even areas that are not traditionally flood-prone are at risk due to changes to the landscape caused by fire. Flooding and flood damage after fire are often more severe, as debris and ash left from the fire can form mudflows.

“The flash flood risk remains significantly higher until vegetation is restored in the burned areas—up to five years after a wildfire.”

Build an Emergency Kit

Assemble an emergency kit in advance to ensure your family’s safety during a flood. This should include:

• Non-perishable food and water for at least three days.
• Medications and a first-aid kit.
• Flashlights, extra batteries and a phone charger.
• Waterproof containers for important documents.
• Protective gear, including gloves and sturdy boots​.

Keep the kit in an accessible location and review its contents regularly to ensure they remain usable.

Prepare for Evacuation

If an evacuation is necessary, having a plan is critical.

Identify safe routes to higher ground, practice your evacuation plan with all family members, and make arrangements for your pets, since many shelters may not accept them.

During a Flash Flood

If a flood warning is issued or conditions worsen:

• Move immediately to higher ground.
• Avoid walking, swimming, or driving through floodwaters. Just six inches of moving water can knock a person over, and two feet can carry away vehicles.
• Do not use bridges over fast-moving water, since they may collapse without warning.
• If water begins to rise while you’re in a car, abandon the vehicle and seek higher ground​.

After the Flood: Proceed with Caution

Returning home after a flood can also be hazardous.

“Pay attention to authorities for information and instructions,” the FEMA spokesperson said. “Return home only when authorities say it is safe.”

They added that heavy work gloves and protective clothing are a good idea during clean-up. People with asthma or other lung conditions shouldn’t enter buildings with potential mold growth, while children shouldn’t take part in the clean-up.

Also, be aware of the potential for unwelcome visitors.

“Snakes or other animals might be in your house,” the spokesperson said.

Finally, be careful to avoid any electrical equipment if it is wet, or if you are standing in water.

“Avoid wading in floodwater, which can be contaminated and contain dangerous debris,” the spokesperson said. “Underground or downed power lines can also electrically charge the water.”

By planning ahead, you can take steps to protect your family, home and community from the worst effects of these sudden disasters.