4 million acres burned in California wildfires

A firefighter battles the Glass Fire burning in a Calistoga, Calif., vineyard Thursday, Oct. 1, 2020. (AP Photo/Noah Berger)

California is poised to hit a fearsome milestone: four million acres (1.6 million hectares) burned this year by wildfires that have killed 30 people and incinerated hundreds of homes in what is already the worst fire season on record.

Flames have scorched an area larger than Connecticut and fire crews at a blaze in the wine country north of San Francisco were on high alert as forecasters warned of red flag conditions of extreme fire danger into Saturday morning.

Winds up to 30 mph (48 kph) were forecast to push through the hills of Napa and Sonoma counties as the Glass Fire, which exploded in size earlier in the week, continued to threaten more than 28,000 homes and other buildings.

A firefighter passes flames while battling the Glass Fire in a Calistoga, Calif., vineyard Thursday, Oct. 1, 2020. (AP Photo/Noah Berger)

Winds were blowing at higher elevations on the western side of the fire and crews expected a long battle to keep flames from jumping containment lines and prevent spot fires from leaping ahead to spark new blazes.

The Glass Fire is the fourth major blaze in the region in three years and comes ahead of the third anniversary of an Oct. 8, 2017, wildfire that killed 22 people.

Around the state, 17,000 firefighters were battling nearly two dozen major blazes. Virtually all the damage has been done since mid-August, when five of the six largest fires in state history erupted. Lightning strikes caused some of the most devastating blazes.

Cal Fire Deputy Chief Jonathan Cox said wildfires have scorched 3.9 million acres in California since Aug. 15.

“It’s likely that over the next day or two we will crest the 4-million-acre mark. The biggest year before this year was 1.54 million,” Cal Fire Chief Thom Porter said.