JACKSON, Wyo. (AP) — Cooler weather and lighter winds are keeping a wildfire near Jackson from making any big runs.

Firefighters successfully conducted burnout operations on Wednesday to eat up fire fuel within containment lines that crews are building around the Horsethief Canyon Fire. That sent up a lot of smoke which is expected to remain in the valley through late Thursday morning.

The 2,918-acre fire is burning south of the resort town next to Snow King Mountain and is about 15 percent contained.

Residents on the east side of Jackson have had their bags and cars packed since Monday in case they need to leave. No evacuation orders have been issued.

The fire has been ruled human-caused but authorities won't release any more details until they finish their investigation.