Heatwave Restarts Air Conditioning Debate

A new study looks at small birds called swifts. Swifts come to Britain every summer. The study shows the birds are very loyal. Most swifts go back to the same nest each year. But swifts are in danger in Britain.

Delhi is very hot now. On Tuesday, the air was 43.5C. But the ground was much hotter. In the sun, the ground reached 64C. Researchers measured it with a camera. The ground gets hotter than the air.

Big storms hit the central United States this week. More than 90 million people are in danger. The storms bring heavy rain, strong wind, and floods. Hot, wet air helps the storms grow strong.