Austin Fire Department outlines wildfire risk, ember threat and prevention options at Environmental Commission meeting

Austin Fire Department wildfire staff told the Environmental Commission on Feb. 19 that Austin's configuration of wildland-urban interface (WUI) and the number of homes adjacent to wildland areas create a meaningful wildfire risk that requires a mix of landscape management, community preparedness and specialized firefighting capacity.

David Bach, wildfire division representative, said national risk summaries that rank Austin among high-exposure cities are driven largely by the number of homes near wildland fuels and by rising reconstruction costs. "No model is precise, but all models are very useful," he said, and added that in Austin the danger is typically not a single moving flame front but numerous ember-driven ignitions that can travel as far as 1.5 miles and, in his remarks, he cited the rule of thumb that roughly 90% of structure ignitions during wildfires are caused by embers rather than direct flame impingement.

Austin's wildfire mitigation approach follows a three-part national…