Rosa Fire initially started 12:27 p.m. Aug. 4 in Riverside County, California. Since its discovery 31 hours ago, it has burned 1,658 acres. A fire crew of 775 effectively contained 15% of the fire as of Tuesday evening. However, the cause is still under investigation.

A vegetation fire ignited in the Santa Rosa Mountains in Riverside County on Monday afternoon, burning 1,200 acres by nightfall and prompting evacuation orders in nearby rural communities.

Evacuation orders were issued as the fast-growing fire quickly engulfed more than 1,600 acres near the Santa Rosa Reservation and Ribbonwood, according to Cal Fire.