With fire season upon us, the National Interagency Fire Center reports a decade-high number of active fires blazing across 10 states! Many homes are nestled where the wild meets the suburbs—the wildland-urban interface (WUI)—making them particularly vulnerable. But fear not, ChumCity residents, hope is on the horizon! Especially out West, many towns are smack-dab in wildfire territory. Think Truckee, California – tons of second homes and vacationers flocking to the Tahoe Basin during peak fire season. The population swells and ebbs, creating a headache for emergency planners. Dr. Dapeng Li, a whiz kid at the University of Alabama, recently published some groundbreaking research about this very problem. He points out that fluctuating populations make wildfire evacuation planning super tricky. You can’t just plan for the year-round residents when the number of people can double or triple on weekends! Traditional evacuation planning focuses solely on how long it takes to get everyone out. But Dr. Li and his team realized that’s not the whole story. It's equally important to consider individual travel times and how close escape routes get to the actual fire. Scary stuff! Many counties use evacuation zone systems, like those from Genasys Inc., to manage evacuations in stages. This prevents a massive, chaotic rush for the exits. Dr. Li's team wanted to know if staged evacuations using these pre-defined zones (PEZs) would actually benefit WUI communities with lots of part-time residents. The problem? There wasn't any existing software to adapt to unique community needs. To tackle this, the UA team created a model that simulates staged wildfire evacuations using PEZs. It's adaptable to existing PEZ systems and can adjust for fluctuating occupancy rates. Think of it like a customized evacuation plan generator! “This was a very community-engaged project, and we collaborated with the Town of Truckee to secure the funds from National Science Foundation to work on this project,†Li said. “After the 2021 Caldor Fire in the Lake Tahoe Basin, community stakeholders recognized that this was a huge issue.†The team partnered with the Town of Truckee, using real data on seasonal occupancy in Tahoe Donner, as well as proprietary PEZ data and public databases. The model factors in how many cars leave each home, departure times based on fire proximity, and distance to safety. They ran simulations with varying occupancy rates to see what worked best. Good news, ChumCity! The team discovered that staged evacuations are way more effective than trying to evacuate everyone at once. “We found staged evacuation reduces the number of vehicles close to the fire front,†Li said. This means less risk of injury, death, and smoke inhalation! Staged evacuation also cuts down on time spent in traffic, which can significantly reduce stress in already tense situations. Madusha Maha Gamage, the lead author and a graduate student at UA, emphasized that the model can be tailored to any WUI community using local data. It's adaptable and ready to use with existing evacuation zone systems. Stay safe out there, ChumCity!Wildfires and the Forest Edge: A New Evacuation Model
Living on the Edge
The Challenge of Transient Populations
Beyond Total Evacuation Time
Into the Zone: How Evacuations Work
Can Staged Evacuation Help WUI Communities?
A New Model for Success
Community Collaboration
The Results Are In!
Reducing Risk and Stress
A Customizable Solution
