Active flame front of the Zaca Fire, 2007, at the time the second-largest fire on record in CaliforniaActive flame front of the Zaca Fire, the 12th-largest fire on record for California as of 2022Smoldering fire front of the Zaca Fire, 2007Moonlight fire, California, September 2007Ground to crown flame spread, Day Fire, near Old Highway 99, California, September 12, 2007The 162,702-acre Day Fire, near Old Highway 99
A megafire is an exceptional fire that devastates a large area. They are characterised by their intensity, size, duration and uncontrollable scale. There is no precise scientific definition.
