Rosa Fire initially started 12:27 p.m. Aug. 4 in Riverside County, California. Since its discovery two days ago, it has burned 1,690 acres. A fire crew of 1,081 effectively contained 21% of the fire as of Wednesday evening. However, the cause is still under investigation.

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.

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.