Officials warned the entire Los Angeles County population of nearly 10 million that anyone may be ordered to evacuate from the flames and toxic smoke.

By Sunday, more than 100,000 people in Los Angeles County had been ordered to evacuate – down from a previous high of more than 150,000 – while another 87,000 faced evacuation warnings.

“These winds combined with low relative humidities, and low fuel moistures will keep the fire threat in all of Los Angeles County very high,” Los Angeles County Fire Chief Anthony Marrone told a press conference, adding that evacuated areas may not be reopened until red flag conditions are lifted on Thursday.