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Welcome to the Age of Fire: California wildfires explained

Firefighters battle the Mosquito Fire burning in unincorporated Placer County in 2022.
Noah Berger
/
AP Photo
Firefighters battle the Mosquito Fire burning in unincorporated Placer County in 2022.

After two mild seasons, California is bracing for whatever 2024 brings.

Favorable weather marked and , when the total acreage burned 鈥 less than 400,000 acres each year 鈥 was considerably lower than the state鈥檚 5-year average of more than 2.3 million acres.

But 2024 has already started in a worrisome way, particularly in areas where two heavy rainy seasons fueled thick grasses and brush. The in the Gorman area of Los Angeles County burned almost 16,000 acres in its first three days and remained active for 11 days in June. The fire raged in steep, hard-to-reach areas, and Cal Fire noted that 鈥渇ire weather conditions鈥 鈥 gusty winds and warm temperatures 鈥 were making it even more difficult to control.

Now the in Oroville is commanding attention, with mandatory evacuation orders issued to about 13,000 residents during an extreme heatwave.

As climate change warms the planet, the state鈥檚 have become so unpredictable and extreme that new words were invented: firenado, gigafire, fire siege 鈥 even fire pandemic. California now has 78 more annual 鈥渇ire days鈥 鈥 when conditions are ripe for fires to spark 鈥 than 50 years ago. When is California鈥檚 wildfire season? .

Nothing is as it was. Where are the worst California wildfires? All over. Whatever NIMBYism that gave comfort to some Californians 鈥 never having a fire in their community before 鈥 no longer applies.

For instance, Southern California鈥檚 coastal fires typically had to be driven by desert winds. But Vegetation along the usually moist coast is so parched that it doesn鈥檛 need Santa Ana winds to fan wildfires.

The summer of 2022, while relatively mild, got off to a deadly start. The  killed four people, and more than 181,00 acres had been torched by the start of August. And lightning strikes touched off a in a densely forested region of Northern California.

2020 was an , the deadliest year in history. And in 2021, the state鈥檚 oldest park, Big Basin Redwoods State Park, by a fire that destroyed roads, bridges, campsites, trails, the visitor center, restrooms and electrical and water systems.

California鈥檚 so-called have lost their immunity. Massive fires tore through dense, moist rainforests where climate change chased away the region鈥檚 protective layer of fog and mist.

What causes California鈥檚 wildfires? Arson and are the major triggers. A 2022 audit showed that to prevent fires. But , like the one that burned Big Basin park, are a fairly recent trend.

Unpredictable and hugely powerful lightning storms 鈥 tens of thousands of strikes in a span of days 鈥 bombard already dry and vulnerable landscapes. Scientists say to as the planet warms. And, aided and abetted by drought, more than have been killed by drought or insects.

Jaw-dropping 鈥溾 spin out from the intense heat thrown off by monster fires, bedeviling crews who can only flee from a 300-foot wall of flames.

The job of battling these larger, more stubborn has become more complicated, fearsome and deadly, straining the state鈥檚

And much, much more costly. The provided this sobering calculation: CalFire鈥檚 total funding for fire protection, resource management and fire prevention has grown from $800 million in 2005-06 to an estimated $3.7 billion in 2021-22.

As the impacts and costs surge, homeowners are still finding that insurance companies are 鈥 even if they fire-harden their property.

More attention is being paid to lingering in communities. Even California鈥檚 crops are harmed, with concerns about a smoke- tainted grape harvest and impacting the state鈥檚 .

Scientists and fire bosses are moving away from all-out suppression of every fire to understanding that fire can be harnessed as a tool. The , long part of the culture of native Californians, are now .

After all, California鈥檚 landscape evolved with fire. What remains is for its inhabitants to adapt to the new reality.

And that requires yet another new term: Welcome to the 鈥淧yrocene,鈥 . The age of fire.

 is a nonprofit, nonpartisan media venture explaining California policies and politics.