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Here’s what you need to know:

Dozens killed in California blazes

The wildfires raging across the state have created a double nightmare for residents: Many of those trying to flee have found the roads to safety clogged.

As of Sunday night, the Camp Fire across more than 111,000 acres near the town of Paradise had killed 29 people, matching a 1933 blaze that was the deadliest in California history. Seven of the victims died in their vehicles.

And outside Los Angeles, a mass evacuation from a fire in the Malibu area has been hampered by congestion on the Pacific Coast Highway, leaving at least two dead. That blaze is expected to worsen in the coming days. Our Climate reporters explain why the state has so many wildfires.

• Video: Footage of the destruction.

• Maps: Track the fires.

• How to help: Research before you donate.