The world is at its hottest since records began. Every month in the past year was over 1.5 degrees Celsius warmer than it was 20 years ago. This is when we started to burn lots of fossil fuel. A climate scientist warned that more records will be broken, "unless we stop putting greenhouse gases into the atmosphere".

Extreme heat hit many countries this year. Extreme temperatures are everywhere. In Death Valley, it was 53.9ºC earlier this week. More than 1,000 people died in Saudi Arabia because of the heat. Scientists say we will see more climate disasters. A climate scientist said Earth was in crisis.