Interior pockets of fuel continue to burn. During the day they will produce smoke, and at night can provide a visible glow, noticeable from across the river. Along the steep northern edge, roll-out of hot debris is a concern and sprinkler systems were installed to provide continuous water to reduce hot spots.

Hot and dry conditions are forecasted for today and residual pockets of vegetation will continue to burn producing visible flame and smoke.

The Microwave Tower Fire, burning 5 miles west of Mosier, has grown to 1,306 acres with 53% containment. The fire, which started on July 22, 2024, is believed to be human-caused and is still under investigation. The fire is burning in brush, timber, and grass.

The Microwave Tower Fire expanded into another 400 acres as it burned during the weekend, burning down cliffs to  Interstate 84 on Sunday.

“On the northeast side, last night's successful firing operations in the grass are helping secure fire lines,” the update said. “Due to inaccessible areas and steep terrain, firing operations remain the safest and most effective strategy to remove fuels and prevent the spread of the fire.”

With lower wind speeds and subdued fire behavior, crews worked to secure more of the fire’s east end with hand line, dozer line, and water drops from helicopters and other air resources. The fire continued to back down on a north-facing ridge along I-84 just west of Mosier and will likely do so through today. Smoke can be observed along the highway.

Update, July 23, 10:30 a.m. — 100 structures are within the fire’s immediate reach, estimated Spokesman Andy Dwyer. The fire is in the urban interface bringing in engines and firefighters who will work from a defensive tack to keep homes from burning.