North Metro Fire Twitter
Crews work to contain a fire that has closed Interstate 25 in Thornton on Feb. 7, 2017. 
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A grass fire in Thornton is causing traffic delays on Interstate 25 southbound as firefighters work to get it under control.
The I-25 off-ramp to 92nd Avenue and Thornton Parkway remains closed, according to a tweet from the Thornton Fire Department.
The fire, which had burned three to four acres Wednesday afternoon, had forced traffic on I-25 at 104th Avenue to one lane, said Sara Farris, a spokeswoman for the North Metro Fire Rescue District.
Firefighters had the fire under control as of 3:30 p.m. but were still fighting hot spots, Farris said. No structures had been threatened, but the fire came close to the property line of North Mor Elementary School in Northglenn.
Crews still working on hot spots
— North Metro Fire (@NMFirePIO)
