More than 1,700 people evacuated because of a wildfire west of Boulder are being allowed to return to their homes after firefighters worked through the night to stop the fire from spreading.

Calm winds and higher humidity helped keep the 144-acre fire from spreading overnight Saturday. It is now 70 percent contained.

Concerns about high winds spreading the flames prompted the evacuation of hundreds of people in the west part of Boulder and in the mountains west of the city when two fires started Friday. The fires then merged into one.

No buildings have burned. The blaze is near an area where a wildfire burned almost 10 square miles and 169 homes last month.