Every time a new heat record is broken, skepticism follows. How do scientists know a day or a summer was really the hottest on record or that a heat wave was historic? DW has the answers.

With parts of the globe aflame in wildfires, deadly heat waves parking over cities, record hot oceans and a strengthening super El Nino, it seems like we’re baking through the…

Wildfires are burning in North America and Europe. Deadly heat waves have parked over cities and the world's oceans are the hottest ever recorded for this time of year. A