A fast-moving brush fire broke out Tuesday morning along the Santa Ana River in Riverside County, sending crews scrambling as the blaze spread through heavy vegetation with no containment in sight.The Bain Fire broke out near Bain Street and Limonite Avenue in Mira Loma. (Representational Image/ UnSplash)What we know so farThe fire, officially named the Bain Fire, started sometime before 11:30am local time near Bain Street and Limonite Avenue in Mira Loma, along the Santa Ana River Bottom off Limonite Ave in Jurupa Valley, according to Cal Fire.By noon, the fire had already burned through at least 20 acres. Cal Fire described it as "burning in heavy fuels with a moderate rate of spread," with containment sitting at 0%. According to KTLA, at least one empty structure and some storage containers were seen burning. No injuries have been reported so far.Also Read: When do polls close for Kentucky Republican Primaries Tuesday? Check voting hours, key documentsResources on the groundTo battle the blaze, 100 personnel were deployed to the scene along with two helicopters and 22 engines, per CBS News.Air Attack also requested two additional air tankers and two more helicopters, according to the Watch Duty app.Check the map and evacuation details hereAs of 1:11pm local time, authorities have issued a formal Evacuation Order for the following area, residents are urged to leave immediately, per wireless emergency alert:North of Arlington AvenueSouth of Garret LaneEast of Arlington AvenueWest of Mitchell AvenueRoads may be blocked and residents are advised to have a backup route or plan ready if possible.Arlington Avenue between Crestview and Western has been closed on the Riverside City side of the river bottom, as per KTLA.Also Read: What happened to Jenny Slatten? 90 Day Fiancé star reveals shocking ALS diagnosis; ‘we cried and…’Sandy fireSouthern California is also dealing with another fire. The Sandy Fire, which broke out Monday morning in Simi Valley, continued to burn as of Tuesday. It had scorched 1,386 acres with just 5% containment, according to KTLA.At least one home was destroyed as over 750 firefighters worked through the night to hold back the quickly spreading fire amid gusty winds.