Explainer-What is behind the heat waves affecting the United States?

By Daniel Trotta (Reuters) – Virtually all the contiguous United States experienced above normal temperatures in the past week, with more dangerously hot weather forecast. The U.S. heat wave followed record heat that killed hundreds if not thousands of people and sparked wildfires in Europe. Following is an explanation of what is causing the heat waves, according to scientists. WHAT IS A HEAT WAVE? A heat wave has no single scientific definition. Depending on the climate of a region, it can be determined by a certain number of days above a specific temperature or percentile of the norm. ARCTIC…

Read More