First responders arrived and began to attempt
suppression of the El Dorado Fire at 10:40 a.m., when it had an area of . Because of the steep terrain, temperatures exceeding , and low humidity, the fire spread rapidly northward and grew to an area of on September 6. In response to the fire's spread, California Governor
Gavin Newsom declared a
state of emergency in San Bernardino County, and evacuations were ordered in
Mountain Home Village,
Oak Glen,
Forest Falls, and Yucaipa. A stretch of
California State Route 38 and the
San Gorgonio Wilderness Area of the
San Bernardino National Forest (SBNF) were closed. On September 7, the fire grew to . Firefighters halted its advance south, though evacuation notices were issued to residents of
Riverside County, to the south of San Bernardino County, and the SBNF was closed. Lower temperatures and higher humidity on September 8 briefly slowed the spread of the El Dorado Fire, which grew to and prompted more evacuations in San Bernardino County. On September 9, the annual
Santa Ana winds fanned the El Dorado Fire, which grew to by the morning of September 12. In spite of winds, continued high temperatures, and low humidity, firefighters made enough progress containing the spread of the El Dorado Fire to allow for the lifting of evacuation orders in Yucaipa and Oak Glen on September 10, September 11, September 12, and September 13, and Riverside County on September 10.
Angelus Oaks and Forest Falls were evacuated at the same time, however, and residents of
Big Bear were advised to evacuate. On September 15, CAL FIRE estimated that the spread of the fire, then at , was 61 percent contained. On September 17 the El Dorado Fire crossed State Route 38 and grew to by the next day. While
U.S. Forest Service Hotshot crews conducted
controlled burns near Angelus Oaks on September 17, wind gusts created local fires that resulted in the death of a firefighter. On September 18 residents of Forest Falls and Mountain Home Village were allowed to return to their homes. By September 24, the fire had grown to , but was estimated to be 81 percent contained and the evacuation order for Angelus Oaks was lifted. Containment reached 93 percent on September 28, and it continued to burn until November 16. ==Effects==