文摘
Heatwaves observed in the past 20–30 years would have been less intense if climate had remained similar to its 1950s levels. Recent warming, partly as a result of anthropogenic activity, largely explains the rapid rise in extreme heatwaves since 2000. A more stable climate of the 1950s would have resulted in far less severe heatwave-related impacts. Comparing differences between observed and stationary climates helps in communicating the urgency of taking climate action.