什么是热风暴？我们先定义热浪：某地某日期连续五天或以上，气温处于历史同期最热的10%。当热浪覆盖全球至少1%——大约相当于加拿大一半的面积——它就成为热风暴，并获得一个名称。
What makes a heat storm? We start by defining a heat wave: five or more days in a row in the hottest 10% of historical temperatures for that place and date. When a heat wave covers at least 1% of the globe — about half the size of Canada — it becomes a heat storm and gets a name.
超大规模热浪曾经罕见。不再如此。路透社揭示“热风暴”的兴起。它们如今在全球肆虐，颠覆各地的生活与气候。
Supersized heat waves used to be rare. No longer. Reuters reveals the rise of ‘heat storms.’They now swarm the globe, upending life and the climate everywhere.