On the macroscopic scale, temperature is the unique physical property that determines the direction of heat flow between ... and a few other countries), the degree Celsius scale is used for ...

Setting a new heatwave record, Brazil on Sunday recorded a heat index hitting 62.3 degrees Celsius, the highest in the last 10 years, weather authorities said. Capital Rio de Janeiro’s heat ...

Last year’s global average temperature easily passed 2023’s record heat and kept going. It surpassed the long-term warming limit of 1.5 degrees Celsius (2.7 degrees Fahrenheit ) since the late ...