Extreme conditions helped drive the fast-moving fires that destroyed thousands of homes in the Pacific Palisades and Altadena.

An event like the Los Angeles fires is now likely to happen every 17 years, a World Weather Attribution report said.

Human-caused climate change made the Los Angeles-area fires more likely and more destructive, according to a study out Tuesday. Why it matters: The study — from an international group of 32 climate researchers — shows how climate change fits into the myriad factors that made the multiple blazes one of California's most destructive and expensive wildfire disasters on record.