Intensifying Heat Wave and Critical Fire Weather Affect Western US

An intensifying heat wave is affecting the Western US, with peak temperatures and expansion expected this weekend across the Southwest, Intermountain West, and northern High Plains. Concurrently, critical to extremely critical fire weather conditions, including "Particularly Dangerous Situation" Red Flag Warnings, are forecast for the Northwest and northern Great Basin. Strong winds up to 60 mph and low humidity create a high risk for extreme fire growth and rapid spread of new ignitions.