From the Document: "Wildfires are unplanned and unwanted fires, including lightning-caused fires, unauthorized human-caused fires, and escaped prescribed fire projects. States are responsible for responding to wildfires that begin on nonfederal (state, local, and private) lands, except for lands protected by federal agencies under cooperative agreements. The federal government is responsible for responding to wildfires that begin on federal lands. [...] As of July 15, 2021, over 34,000 wildfires have impacted nearly 2.3 million acres. The nationwide preparedness level is at the maximum level (5), suggesting significant commitment of shared resources."
CRS In Focus, IF10244
Congressional Research Service: https://crsreports.congress.gov/