The Bighorn Fire burning north of Tucson has grown to 15,805 acres, but progress has been made with containment reaching 30% Tuesday morning.
Storms to the south and east of the blaze on Monday limited the fire spread.
Humidity from Monday will dissipate and hot, dry conditions are expected today, with strong southwest winds of up to 30 miles per hour expected.
Today, firefighters are focusing on creating solid, defensible space around the community of Summerhaven on Mount Lemmon, using bulldozers and excavators to bolster fuel breaks, in the event that the fire moves up the mountain.
Crews are placing bright orange portable water tanks known as pumpkins among the homes of the mountaintop town to feed sprinkler systems and strategically placed firehoses.