After a summer of severe drought and raging wildfires, California is now facing a series of storms and intense flooding. How did the state go from one extreme to the other?
Climate scientist Dr Daniel Swain explains how climate change is increasing the risks of extreme weather.
And he says the latest round of deadly storms in California should be a wake-up call around the world.
This article was originally published by Bbc.co.uk. Read the original article here.