Flash floods are one of the most dangerous weather events, and Denver, with its unique geography, is no stranger to them. Sudden downpours can quickly turn streets into rivers, posing serious risks to life and property. Being prepared and knowing how to respond can make a huge difference in how you handle these emergencies. In this blog, we’ll explore how to stay safe during a Denver flash flood, from understanding flood warnings to creating an emergency plan.
TLDR – Quick Guide
- Flash floods in Denver can occur rapidly, often with little warning.
- Prepare an emergency kit with essentials such as food, water, and first-aid supplies.
- Stay informed by monitoring local weather alerts and warnings.
- Know the flood-prone areas in Denver and avoid driving or walking through flooded zones.
- Have an evacuation plan ready for your family and pets.
- After a flood, be cautious of contaminated water, electrical hazards, and structural damage.
What Causes Flash Floods in Denver?
Water damage can escalate quickly. Within minutes, water can seep into walls, flooring, and furniture, Denver’s geography plays a significant role in flash flood risks. The city is located at the base of the Rocky Mountains, meaning water from mountain storms can quickly travel downstream into the urban area. Monsoon season, which typically runs from July to September, often brings intense thunderstorms that dump large amounts of rain in short periods. The city’s infrastructure, while extensive, sometimes struggles to handle these sudden deluges, causing flash flooding in low-lying areas.
Denver flash floods are typically caused by:
- Heavy rainfall from thunderstorms: Intense storms can dump inches of rain within minutes, overwhelming drainage systems.
- Urban development: As the city grows, more surfaces are paved, reducing the amount of land that can absorb rainwater.
Runoff from mountains: Water flowing down from the Rockies can surge into Denver’s rivers and streams, causing floods.
Understanding Flash Flood Warnings and Alerts
In Denver, flash flood warnings are issued when conditions indicate an imminent threat. It’s crucial to differentiate between the types of alerts:
- Flash Flood Watch: Conditions are favorable for flash flooding. Be alert, monitor the weather, and be ready to take action.
- Flash Flood Warning: Flash flooding is either already happening or is about to happen in your area. Immediate action is required.
- Flash Flood Emergency: A severe flooding event that poses a threat to life and property. Evacuate or take shelter immediately.
Make sure you have multiple ways to receive these warnings, such as through weather apps, NOAA Weather Radio, or local news channels. Denver’s Office of Emergency Management also sends alerts to residents during severe weather events.
Preparing for a Denver Flash Flood
Preparation is key when it comes to handling flash floods. Even though these events often strike with little warning, having an emergency plan and the necessary supplies can help you react quickly and stay safe.
1. Build an Emergency Kit
Your emergency kit should contain enough supplies to last at least 72 hours. Essentials include:
- Water (one gallon per person per day)
- Non-perishable food
- Battery-powered or hand-crank radio to stay informed about weather alerts
- Flashlight and extra batteries
- First-aid kit
- Medications and any personal hygiene products
- Important documents (insurance papers, IDs, etc.) stored in a waterproof container
- Extra cash in case ATMs are down
- Clothing and blankets to stay warm and dry
2. Create a Family Communication Plan
Develop a communication plan with your family so everyone knows what to do if you’re separated during a flood. Identify a meeting point and make sure all family members know how to send updates, either by phone or through social media.
3. Identify Flood-Prone Areas
Denver has several areas prone to flash flooding, particularly near rivers and creeks, such as Cherry Creek, the South Platte River, and Sand Creek. Make yourself familiar with these areas, and if your home or workplace is located near one of them, have a plan to evacuate quickly.
4. Evacuation Plan for Your Home
Know the safest routes out of your home and neighborhood, and have a plan for your pets. If your home is in a high-risk flood zone, consider investing in flood barriers or sandbags to protect your property.
What to Do During a Denver Flash Flood
During a flash flood, staying calm and acting quickly is critical. Follow these steps to stay safe:
1. Seek High Ground Immediately
If a flash flood warning is issued for your area, move to higher ground without delay. Avoid basements or any lower floors, as these are often the first places to flood.
2. Avoid Driving Through Flooded Areas
Driving through flooded streets is extremely dangerous. Even just a few inches of water can cause your car to lose traction and be swept away. Remember the saying: “Turn around, don’t drown.” If you see water over the road, do not attempt to cross it.
3. Stay Informed
Continue to monitor weather updates and flood warnings via a battery-powered radio or mobile phone. These updates can provide critical information on how the situation is evolving and when it’s safe to return home.
What to Do After a Flash Flood
While DIY methods can be tempting, mold remediation in crawl spaces is best left to professionals. Here’s Once the floodwaters begin to recede, it’s important to remain cautious. Even after the immediate danger has passed, there can be hidden hazards such as contaminated water, unstable structures, and electrical risks.
1. Wait for Authorities’ Approval to Return
Do not return home until local authorities have declared the area safe. Even if the water seems to have subsided, there may be hidden dangers such as weakened bridges or damaged roads.
2. Avoid Floodwater
Floodwater can carry dangerous contaminants, including sewage, chemicals, and debris. Avoid coming into contact with it if possible, and if you must, ensure you wear protective clothing.
3. Check for Structural Damage
Before entering your home, check for structural damage such as cracks in the foundation, roof, or walls. If you suspect any damage, have a professional inspect your home before reentering.
4. Document Damage for Insurance
Take photos or videos of any damage to your property to provide documentation for insurance claims. Be sure to contact your insurance company as soon as possible to begin the claims process.
Key Takeaways
- Denver is susceptible to flash floods, especially during monsoon season.
- Flash flood warnings are serious and require immediate action to stay safe.
- Preparation, including an emergency kit and a family communication plan, is essential.
- During a flood, prioritize moving to higher ground and avoid driving through floodwater.
- After a flood, be cautious of structural damage and water contamination.
FAQs
1. What is the best way to stay informed about a Denver flash flood?
Use multiple sources for weather alerts, including mobile apps, NOAA Weather Radio, and local news broadcasts. Denver’s Office of Emergency Management also issues warnings to residents during severe weather events.
2. What should I do if I’m driving when a flash flood hits?
If you’re driving and encounter floodwater, do not attempt to drive through it. Turn around and find an alternative route, even if it means waiting for water to subside. Just a few inches of water can sweep a car away.
3. Can I protect my home from flash floods in Denver?
Yes, you can take steps such as installing flood barriers, using sandbags, and ensuring proper drainage around your home. If you live in a flood-prone area, consider elevating your property or improving your home’s flood resistance through structural modifications.