The Contreras Fire in the Baboquivari Mountains has burned 28,977 acres with 50% containment as of 9 a.m. Wednesday, June 22.
The fire was started by a lightning strike on Saturday, June 11.
Experts think the fire will be less active Wednesday due to humid conditions and the possibility of thunderstorms.
“Threats to Kitt Peak Observatory, Pan Tak and Hayhook Estates are expected to be significantly reduced over the next 36 hours as interior vegetation to the north and east burn out,” the Arizona - Bureau of Land Management said in a release. “Flash flooding is a concern with periods of intense rainfall.”
Crews will do more burnout operations Wednesday to strengthen containment lines while aircraft will provide support to the ground crews.