A new University of Oxford study finds that almost half of the global population (3.79 billion) will be living with extreme heat by 2050 if the world reaches 2.0°C of global warming above pre-industrial levels—a scenario that climate scientists see as increasingly likely.

A new University of Oxford study finds that almost half of the global population (3.79 billion) will be living with extreme heat by 2050 i

Most of the impacts will be felt early on as the world passes the 1.5°C target set by the Paris Agreement, the authors warn. In 2010, 23% of the world’s population lived with extreme heat, and this is set to grow to 41% over the next decades.