The climate pattern that tends to bring drier, warmer conditions to the southern half of the United States and wetter weather to the northern half has ended, NOAA said Thursday.
A nonprofit backed by Al Gore and other big environmental donors says it can track emissions down to individual power plants, oil fields and cargo ships.
The Indian subcontinent has recorded above-average temperatures for weeks. Heat-related weather watches or alerts are now in effect for hundreds of millions of people.