Published: Oct 29, 2010 7:00 PM EDT
Updated: Oct 29, 2010 4:01 PM EDT

BOULDER, Colo. (AP) - Two small wildfires burning in Boulder County, Colo., have prompted evacuations in the city of Boulder as well as the neighboring foothills.

Three subdivisions in the foothills were evacuated Friday morning. Later, authorities also ordered evacuations for a portion of Boulder's west side, where about 1,700 people live. Two medical buildings were also being evacuated.

There was a smell of smoke on the campus of the University of Colorado in Boulder.

The fires are burning on about 20 acres on public land. It's closer to the city than the wildfire that destroyed more than 160 houses in the foothills last month.

One airplane is dropping fire retardant and about two dozen firefighters on the ground are trying to contain the blaze.