EXTREME HEAT July 23, 2024 7:10 pm July 21, 2024 was the world's hottest day on record The hottest day ever recorded on the planet happened this past Sunday, July 21, coming in at 62.76 degrees Fahrenheit (17.09 degrees Celsius). US & World Videos 1:53 Human head washes ashore on Key Biscayne 1:37 Tropical system now has 90 percent chance to develop 2:12 72-year-old man on bike falls off rising drawbridge in Hollywood: Police 2:37 Trump reportedly picking Marco Rubio as his secretary of state 0:51 Police respond after human head washes ashore at Key Biscayne