By Mark Kinver
Environment reporterPublished1 day agoShareRelated Topics

https://www.bbc.com/news/science-environment-56225862

• Climate change

In our monthly feature, Then and Now, we reveal some of the ways that planet Earth has been changing against the backdrop of a warming world. Here, we look at the effects of extreme weather on a crucial reservoir that supplies water to millions of people in northern California.

This year islikely to be critically dry for California.Winter storms that dumped heavy snow and rain across the state are not expected to be substantial enough to counterbalance drought conditions.

Lake Oroville plays a key role in California’s complex water delivery system.

Bidwell Marina at Lake Oroville, California

Drag button to see how extreme drought has affected lake

Source: Getty

This 65km-square body of water north of Sacramento is the second-largest reservoir in California.

Not only does Lake Oroville store water, it helps control…