EARTH SCIENCES

This picture taken on July 25, 2014 shows people cooling off in a waterpark in Suining, southwest China's Sichuan province. Meteorological departments issued an orange alert for high temperature as a heat wave embraces Sichuan province, with temperature of most area topped 37 , local media reported. CHINA OUT AFP PHOTO (Photo credit should read STR/AFP/Getty Images)

Deadly Heat Waves Could Threaten 3 in 4 People By 2100

WASHINGTON — If humans fail to drastically cut carbon emissions, 3 in 4 people on the planet could be exposed to deadly heat waves by the end of the century, a new study has found. And even if c...