Heat waves over land worldwide are beginning earlier, ending later and occurring over longer seasons, while the first heat wave of the season has recently shifted toward faster onset, according to a ...

Dozens of cities are expected to meet or surpass record high temperatures for this time of year as part of a heat wave that will hit huge swaths of the country.

Summer heat is rising, and the way cities are built can add several more degrees. From street trees to reflective roofs, ...