This is a developing story and will be updated.
A fast-moving wildfire burning in the Santa Ana River bottom between Jurupa Valley and Riverside has grown to more than 800 acres Tuesday, forcing evacuations and injuring four civilians.
The blaze, dubbed the Bain Fire, started around 11 a.m. near the border of Riverside and Jurupa Valley. Firefighters from multiple agencies responded as flames spread through heavy vegetation in the river bottom…