Explainer: What’s causing the recent U.S. heat waves?

Much of the United States will experience another heat wave this week, with above-normal temperatures forecast for the Pacific Northwest, Southern Plains and the Lower Mississippi Valley.

The extreme heat is fueling a fast-moving California wildfire, just went of Yosemite National Park. The Oak Fire has destroyed 10 structures and is 10% contained.

The U.S. heat wave followed record heat that killed hundreds if not thousands of people and sparked wildfires in Europe.

Continue reading on Reuters.