CAVE CREEK, AZ (AZFamily) — Firefighters continued battling the Kay Fire burning in the Desert Hills area northeast of Cave Creek, attacking the flames from the ground and the air. The wildfire was estimated at 40 acres and is one of several burning across Arizona. Fire officials said crews were on scene within minutes of the fire sparking Monday. Among the first to respond: volunteers with the Tonto Hills Volunteer Fire Department—people whose day jobs don’t typically include fighting wildfires.