( CNN ) -- Firefighters battling a California wildfire overnight progressed in making containment lines . The firefighters took advantage of the lower temperatures at night to make `` backfires '' that helped secure the containment lines , fire management spokesman Marc Peebles said . The work , however , did not change the percentage of the fire that was contained . It remained at 30 % on Saturday . The Colby wildfire , as it is called , continued to burn Saturday on about 1,863 acres of foothills of Los Angeles County near Glendora . An illegal campfire apparently ignited the wildfire , and fire officials cited drought conditions as contributing to the blaze . One area resident , Korey Rowe , who moved to Los Angeles just six days , photographed the blaze and firefighting helicopters for a CNN iReport . He woke to the choppers flying over his home and then drove to see the blaze Friday . `` It was my first wildfire , '' said Rowe , 30 . `` There was ash raining down all over us . I could feel the heat , it was awesome . The cops had shut the roads down . '' Also Friday , California Gov . Jerry Brown declared a drought emergency for the state , saying it is facing `` perhaps the worst drought that California has ever seen since records ( began ) about 100 years ago . '' The Colby fire began before dawn Thursday and allegedly originated with three men camping in the foothills near Glendora , authorities said . The campers were tossing paper into a campfire , and a gust of wind spread embers , authorities said . The three men , all in their early 20s , were arrested on suspicion of recklessly starting a fire , said police Chief Tim Staab of Glendora . One man is from Glendora and another is from Irwindale , he said . The third man 's hometown was not known . Bail was set Thursday at $ 20,000 for each . The three men arrested were identified as Jonathan Carl Jerrell , 23 ; Clifford Eugene Henry Jr. , 22 ; and Steven Robert Aguirre , 21 , police said . They and their attorneys could n't be reached for comment . CNN 's AnneClaire Stapleton and Michael Martinez contributed to this report .
NEW : `` There was ash raining down all over us , '' Irwindale iReporter says . Colby wildfire remains steady at 30 % contained . It continues to burn on about 1,863 acres near Los Angeles County . The fire has been burning since their early 20s .