The past three days were quite likely the hottest in Earth’s modern history, scientists said on Thursday, as an astonishing surge of heat across the globe continued to shatter temperature records from North America to Antarctica.
The spike comes as forecasters warn that the Earth could be entering a multiyear period of exceptional warmth driven by two main factors: continued emissions of heat-trapping gases, mainly caused by humans burning oil, gas and coal; and the return of El Niño, a…