Investigators are looking into what caused multiple destructive wildfires in Los Angeles, possibly linked to utility infrastructure or human activities, given absence of lightning.
Research shows U.S. wildfires have quadrupled in size and tripled in frequency since the 1980s, with fast-moving fires proving especially destructive to structures.
While lightning is a typical wildfire trigger, the majority threatening communities arise from human activities, such as equipment misuse and neglected infrastructure.
Wildfires are increasingly destructive due to a combination of climate change, wind speed, dry fuel, and inadequate land-management practices that increase their risk.
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