Prepare for and survive Flash Floods

Bob Mayer
4 min readMay 25, 2023


Flash Flood

Someone on twitter asked me about this, referencing several recent disasters, where people experienced flash floods. So here goes.

Flash floods are sudden and powerful natural disasters that can occur with little to no warning. They pose a significant risk to life and property, making it crucial for individuals and communities to be prepared. By taking proactive steps and having a solid emergency plan in place, you can enhance your safety and minimize the potential damage caused by flash floods.

1. Understand Flash Floods:

To effectively prepare for flash floods, it’s important to understand what they are and how they occur. Flash floods are rapid-onset floods caused by heavy rainfall, dam or levee failures, or sudden snowmelt. They often happen in low-lying areas, near rivers, and in urban environments with poor drainage systems. Recognizing the signs and knowing the flood-prone areas in your vicinity will help you make informed decisions and take immediate action when necessary. However, a lot depends on the composition of the ground under you. Our house in Boulder, Colorado, on top of a ridgeline, flooded after a torrential flash rain and the entire water table rose up and flooded everyone’s basement. So be aware of drainage!

2. Stay Informed:

Keeping yourself updated with weather forecasts and flood warnings is vital. Utilize local news sources, weather apps, and official websites to stay informed about potential flood risks. Sign up for emergency alerts or notification systems provided by your local government or disaster management agencies. This will enable you to receive timely information, evacuation orders, and safety instructions.

3. Create an Emergency Plan:

Developing a comprehensive emergency plan is essential for every household. Discuss the plan with your family members or roommates to ensure everyone understands their roles and responsibilities. The plan should include:

a. Evacuation Routes: Identify the safest evacuation routes from your home or workplace to higher ground. Be aware of alternate routes in case the primary ones are inaccessible.

b. Emergency Meeting Points: Establish designated meeting points both within your neighborhood and outside, in case family members are separated during the evacuation. I cover the IRP, ERP and Big Out Hide Site (BOHS) in detail in The Green Beret Preparation and Survival Guide. In fact, everything below is covered in detail there, but this is an overview.

c. Communication Strategy: Determine a reliable communication method to stay in touch with your loved ones during emergencies. Share contact information with each other and have backup power sources for mobile devices.

d. Emergency Kit: Prepare a well-stocked emergency kit that includes essential items such as non-perishable food, water, medication, flashlights, batteries, a first aid kit, extra clothing, blankets, and a battery-powered radio.

4. Safeguard Your Property:

Taking preemptive measures to protect your property can significantly reduce flood-related damage. Consider the following steps:

a. Elevate Essential Utilities: Raise electrical panels, switches, sockets, and wiring systems above the flood level. Similarly, elevate HVAC equipment, water heaters, and other appliances.

b. Install Check Valves: Fit check valves in sewer traps and drainpipes to prevent floodwater from backing up into your home.

c. Waterproof Basements: Apply waterproofing sealants to basement walls and floors. Consider using flood-resistant materials and keep valuable items elevated or stored in waterproof containers.

d. Clear Gutters and Drains: Regularly clean and maintain gutters, downspouts, and drains to ensure proper water flow. This will prevent clogging and minimize the risk of localized flooding. One item I highly recommend getting that can save your life and/or save you a lot of damage from accidental floods is a water alarm. Here’s a post I did on that after the deadly floods in Kentucky in 2022. Here is the direct link to a battery powered alarm on Amazon — definitely worth $12.50.

5. Insurance Coverage:

Review your insurance policy, especially the coverage for flood damage. Standard homeowner’s insurance typically does not cover flood-related losses, so it is crucial to consider purchasing flood insurance separately. Consult with your insurance provider to understand the options available and ensure adequate coverage for your property.

6. Practice Flood Safety:

During a flash flood, personal safety should be your top priority. Remember the following safety guidelines:

a. Evacuation: If authorities issue an evacuation order, follow it immediately. Do not attempt to cross flooded areas by foot or in a vehicle.

b. Avoid Low-Lying Areas

: Stay away from creeks, streams, and drainage channels, as they can quickly fill with fast-flowing water.

c. Turn Off Utilities: Before leaving your home, turn off gas, electricity, and water supplies to prevent hazards or further damage.

d. Seek Higher Ground: Move to higher elevations and find sturdy shelter in a multi-story building or on a roof if necessary. Never seek refuge in a flooded attic or basement.

e. Do Not Drive Through Floodwater: Avoid driving through flooded roads, bridges, or underpasses. The depth and strength of the water may be deceptive, and you risk being swept away. I cover what to do if you get swept away in your car in the books and elsewhere.


Preparing for flash floods is crucial to safeguard yourself, your family, and your property from the devastating impacts of these sudden disasters. By understanding the risks, staying informed, creating an emergency plan, protecting your property, and practicing flood safety measures, you can be better prepared to respond effectively and mitigate potential damage. Remember, preparedness is the key to resilience, and it can make a significant difference in your safety and well-being during flash flood events.

What specific disaster, perhaps unique to where you live, would you like to see me cover?

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Bob Mayer

West Point grad; Special Ops Vet; NY Times bestseller of over 80 books; for free books and over 200 free downloadable slideshows go to