The glowing embers that escape into the air from wildfires can travel up to 40 kilometers (24 miles) before landing and igniting new fires. Because embers act so erratically, measuring how their behavior changes from one second to the next while they are still airborne is crucial. NIST has a tool called an emberometer to help. It can help fire engineers determine the size and trajectory of embers, which may provide insights into their level of threat. Get to know the emberometer: https://www.nis