committed elsewhere. Retardant is generally ineffective when dropped from air where winds are blowing down a hill (foehn wind event) from 45–70 mph. The retardant gets intermixed with the wind and is dispersed, thus it never reaches its intended target. This makes Southern California unique when fighting fires from the sky, during a Santa Ana wind event. See also List of California wildfires References External links Southern California's Worst Brush Fires Wildfires in San Diego County, California 1970 fires in the United States 1970 in California 1970s wildfires in the United States Laguna Mountains East County (San Diego County) 1970 natural disasters in the United States