We see floods, fires and heatwaves on TV news nearly every day now. Scientists have just announced that July was the hottest month ever. Scientists from the National Oceanic and Atmospheric Administration (NOAA) in the USA said: "July is typically the world's warmest month of the year, but July 2021 outdid itself as the hottest July and hottest month ever." Earth's land and ocean temperature in July was 0.93 degree Celsius higher than the 20th-century average of 15.8 degrees. The Northern Hemisphere was 1.54 degrees Celsius hotter than average.

NOAA said this heat record was worrying. It said: "In this case, first place is the worst place to be." The U.N. just issued a 4,000-page report on climate change. The report is from the Inter-governmental Panel on Climate Change. It stated that humans had changed the climate. It wrote: "It is [clear] that human influence has warmed the atmosphere, ocean and land." A total of 234 scientists from 66 countries wrote the report. It said extreme weather would continue and "every region" would experience "multiple changes" in weather, like boiling heat and flooding.