"When you're dealing with a wind-driven fire, the wind dictates the progression of the flames," Brown said.
Embers were blown up to 800m in advance of the worst-hit areas, Brown said, causing isolated spot fires across the area.
Los Angeles has suffered record-low rainfalls this year, with just 8.15cm of rain between Jan. 1 and June 30 -- a fifth of the average rainfall and the lowest since records began 130 years ago.
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