The week began with a biting cold snap that hammered much of the U.S., then came the catastrophe of rampant and deadly wildfires in a California desiccated by extreme drought. Scientists say the week’s extreme weather is one of the hallmarks of climate change.

How a week of weather extremes upended the lives of millions of Americans

The week began with a biting cold snap that hammered much of the U.S., then came the catastrophe of rampant and deadly wildfires in a California desiccated by extreme drought. Scientists say the week’s extreme weather is one of the hallmarks of climate change.