Residents of a small Northern California town were asked Wednesday to immediately evacuate the areas around a swift fire moving rapidly along a busy thoroughfare, authorities said.

Flames broke out at a commercial structure in the 16200 block of Main Street in Lower Lake, Lake County, Cal Fire said at 3:30 p.m. on social media. The 7-acre blaze, dubbed the Adams Fire, had a “rapid rate” of spread and structures were threatened, Cal Fire said.

The evacuation order remained in place just before 4 p.m. for zone LOW-E169 extended south from Morgan Valley Road to Spruce Grove Road, according to the county’s evacuation map. The orders also included areas from Highway 29 and Main Street, spreading east.

“There is an IMMEDIATE threat to life and property to anyone in the impacted zone,” the Lake County Sheriff’s Office said online. “Gather household members, pets, and essential items (including medication), lock your home, and leave now.”

Evacuation zones LOW-E170 and LOW-E176, south and southeast of the mandatory evacuation were also warned to leave, authorities said.

Cal Fire is fighting the blaze along with the Lake County Fire Protection District.