California firefighters ‘stretched to limit’ as devastating blazes become the norm

Tens of thousands of firefighters are working across the US west - but extreme conditions are making wildfires exponentially worse

Before the ravenous Caldor fire laid siege to South Lake Tahoe, California's top firefighting priority lay just to the north, where the Dixie fire scorched more land than any other single fire in state history. Together, the two behemoths have already blackened more than 1m acres (4,000 sq km) along the Sierra Nevada range. And fire season in the American west is just heating up.

The climate crisis has helped create extreme fire emergencies, with huge, rapid-moving blazes tearing through a hot, parched landscape at lightning speed. Fires have hopped granite summits firefighters had hoped would slow their spread. Blazes have displayed erratic burn behavior, making their movements hard to predict.