Aug. 9 (UPI) -- An air quality alert was issued for parts of Southern California because of the effects of the Canyon Fire, fueled by dry brush and extreme heat. But evacuation orders were canceled and shifted to warnings for thousands of residents in Ventura and Los Angeles counties, CalFire said Saturday . The wildfire had spread to 5,370 acres and was 28% contained, the state agency said. On Friday morning, it was 4,756 acres, but none contained. The fire ignited on Thursday afternoon in a