FORESTHILL, Calif. (AP) - Fire officials say 50 homes are threatened by a fire in a steep and heavily wooded area in Placer County - one of four fires still burning in Northern California.

The California Department of Forestry and Fire Protection on Thursday said about 200 people from the Iowa Hill community were staying at a Red Cross evacuation center in Foresthill.

The Robbers fire had consumed about half a square mile and was 20-percent contained.

Further north in Mendocino National Forest, the Mill fire had charred about 26 square miles and was about 38 percent contained.

In Shasta-Trinity National Forest, the Flat fire was burning about 30 miles west of Weaverville and had scorched about a square mile.

A smaller fire in Colusa County was almost fully contained.