A huge wildfire tearing through northern California became the third largest in the state's history Friday, and looked set to continue growing.
A long-term drought that scientists say is driven by climate change has left the western United States parched -- and vulnerable to explosive and highly destructive fires.
The Dixie Fire, which this week razed the Gold Rush town of Greenville, has torched more than 1,700 square kilometers (650 square miles) since it erupted in mid-July.
Plumas County Sheriff Todd Johns, who is helping to co-ordinate the fight against the fire, said the destruction was devastating.
"I am a lifelong resident of Greenville. My heart is crushed by what has occurred there," he told a briefing on Thursday.
"To the folks that have lost residences and businesses... their life is now forever changed.
"All I can tell you is: I'm sorry."
The town of Greenville stood charred and in ruins Friday, with timber structures gone completely and some stone buildings reduced to rubble.
Todds said there were no injuries so far from the huge blaze, but stressed it was vital that people in the path of the fire heeded evacuation warnings.
"This fire is not over. If that plume is anywhere near your direction... you need to prepare. Wherever the wind blows this fire, that's where it's going to go."
Over 5,000 personnel are battling the blaze, which is sending enormous clouds of smoke into the air that are easily visible from space.
The Dixie Fire grew overnight to more than 430,000 acres (174,000 hectares), making it larger than the Bootleg fire that has laid waste to a swathe of Oregon over the last month.
Thousands of square kilometers of the western United States has burned this year, an alarming result of the warming planet that has affected weather patterns.
By late July, the number of acres burned in California was up more than 250 percent from 2020 -- itself the worst year of wildfires in the state's modern history.
The Dixie Fire has evoked painful memories of the Paradise Fire, the deadliest blaze in California's recent history.
Faulty power lines sparked the inferno, which swept through the northern town of Paradise in 2018, killing 86 people. Pacific Gas and Electric, California's largest energy utility firm, was deemed responsible.
PG&E equipment is again being blamed for the Dixie Fire, after a tree fell on a power conductor the day the blaze began.
The utility announced in late July it will bury 10,000 miles (16,000 kilometers) of power lines in a massive bid to prevent its equipment from igniting more deadly wildfires.
Greenville itself is no stranger to fire disasters. A catastrophic blaze destroyed much of the town in 1881, and several major infernos have threatened residents in the intervening 140 years.