More evacuation notices have been issued as a wildfire in northern Colorado grew from 1,000 acres to more than 5,000 acres overnight.
The blaze northwest of Fort Collins is still only about 5 percent contained. Nearly 400 firefighters headed back to the fire lines on Thursday.
Two groups of residents have received notices to be prepared for possible evacuations, but no one has had to leave. The fire is within a quarter mile of some homes.
The U.S. Forest Service says the fire was caused by humans. The investigation into how it started is continuing.
In western Colorado, firefighters expected to have a 170-acre fire between Delta and Whitewater fully contained sometime Friday. That fire was started by lightning. No structures are threatened.