The decision came as the wildfire, which started Aug. 17 in the Buckley Draw near Provo, reached 42% containment, all along the west and southwest perimeter, according to the U.S. Forest Service. The size did not grow Sunday due to cooler temperatures and higher humidity and remained at 452 acres.

“We’ve seen such significant progress,” Northern Utah Type 3 Incident Management Team spokesperson Sierra Hellstrom said.

Though the fire has not reached full containment, Hellstrom said the lack of recent growth and small amounts of moisture received Sunday led to the fire type reduction.

“We feel comfortable enough leaving it with the home unit to continue to work the rest of the perimeter, where we’ve still got fire activity,” Hellstrom said.

As a type 4 fire, remaining resources include an incident commander, local fire crews, a fire engine and two helicopters.

“We don’t need our entire management team here; logistically, most of them are local resources, so they can go home at night,” Hellstrom said. “We don’t need to have a camp and caterers.”

Despite the progress, the U.S. Forest Service said an infrared flight detected several remaining active hot spots along the north, northeast and east flanks of the fire. Fire managers will not declare a fire line contained if there is detected heat due to continued threats.

Rain is expected this week in Provo, with a 90% chance Tuesday and a 50% chance Wednesday.

Hellstrom said an infrared flight will fly again next weekend to determine hot spot levels.

“We’re going to wait until this rain comes through the area, and once it’s pushed through, we will do another infrared flight over it to see if we’re still getting any of those hot spots and then address them,” she said.

Drone intrusions remain an issue, with 12 reportable instances grounding aircraft and 22 overall since the fire started. Provo police spokesperson Jana-Lee Holland said via social media Monday that an air support drone team had identified five different operators with intrusions and charges for those incidents were referred for prosecution review.

“We’ll keep up the search, the lookouts. Just stay away,” Holland said. “Look up the FAA rules; the zones do change over a few days’ period, so keep looking up, and before you fly anything, just please make sure you don’t go anywhere near the no-fly zone.”