Emir Dunn, an inmate firefighter stationed at the Chamberlain Creek Conservation fire camp in California, at work on a fire. About 4,000 inmate firefighters battle blazes across the state. Adam Grossberg/KQED hide caption

itoggle caption Adam Grossberg/KQED

Crews work a controlled burn in Geneva, Fla., in December. The state's forest service has rolled out a system to track equipment during fires, and hopes it can eventually be used to pinpoint firefighters, too. Joshua C. Cruey/Courtesy of the Orlando Sentinel hide caption

itoggle caption Joshua C. Cruey/Courtesy of the Orlando Sentinel

Former Granite Mountain Hotshot firefighters walk past ceremonial firefighter boots and gear during a memorial honoring 19 fallen firefighters in Prescott Valley, Ariz., on Tuesday. Pool/Getty Images hide caption

itoggle caption Pool/Getty Images