Emerging Pacific Ocean heat, combined with ongoing human-caused global warming, is a grim recipe for deadly climate extremes. Heat alone already kills more than 500,000 annually.

Climatologists say a particularly powerful weather pattern could amplify wildfire risk, heatwaves and flooding worldwide as global temperatures continue to rise

Climate change has driven record-breaking outbreaks of fire in Africa, Asia and elsewhere this year, with conditions expected to get worse as the northern hemisphere's summer…