Extreme heat was forecast across the globe on Wednesday, as wildfires raged and health warnings were in place in parts of Asia, Europe and North America. Scientists have long warned that climate change, caused by greenhouse gas emissions mainly from burning fossil fuels, will make heatwaves more frequent, severe and deadly.
Firefighters battled blazes in parts of Greece and the Canary Islands while Spain issued heat alerts and some children in Italy's Sardinia were told to stay away from sports.
