WorldA Summer of Record-Breaking Heat: How Hot Is the World?

Several parts of the world are enduring record-breaking heat this summer. South Korea has experienced its hottest day on record, while temperatures exceeded 40 degrees Celsius for a fifth consecutive day. A persistent heatwave is severely affecting Europe: Italy issued its highest-level red heat warnings for nearly all major cities, while wildfires troubled Greece and the northern United States. The extreme heat is also affecting power supplies, food and agriculture, raising questions about a warming planet.