Brazil: with more than 62 degrees felt, Rio is suffocating under unprecedented heat. Local authorities call for avoiding prolonged exposure to the sun and staying hydrated.
In São Paulo, the largest city in South America with double the population of Rio, more than 12 million, Saturday was the hottest day of the year. There is a synergy between human-caused climate change and natural climate oscillations, such as El Niño, in tropical South America, says Davide Faranda, director of climatology research at CNRS.