Evacuation orders were issued as the fast-growing fire quickly engulfed more than 1,200 acres near the Santa Rosa Reservation and Ribbonwood, according to Cal Fire.

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.