Franklin County firefighters were busy Wednesday evening with two fires, one near Mesa and another that closed the northbound lanes of Highway 395 near the Adams-Franklin county line.
Fire Chief Steve Cooper with Franklin Fire District 4 said the fire near Highway 395 initially was reported as starting in Franklin County after 3 p.m. It later was discovered to be in Adams County, though Cooper said his crews went to help.
Smoke across the roadway led authorities to close the highway's northbound lanes. Cooper said the fire was out as of 5 p.m. after scorching about 500 to 600 acres.
The cause was unknown, but it appeared to have started near the highway, he said.
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Cooper's district also sent trucks to work with Franklin fire districts 1, 3 and 5 on a blaze a half-mile south of Mesa that was quickly controlled.
The Tri-City area was under a red-flag fire warning Wednesday night from the National Weather Service.
Minimum relative humidity was expected to drop to as low as 15 percent.
Low humidity, combined with winds of about 15 mph and hot temperatures, could allow wildfires to grow quickly.