Research shows one billion more people are currently facing at least one day of "extreme heat stress" annually compared to the 1970s. Subtropical regions now experience up to 50 additional days annually with "strong to extreme heat stress,"

Research shows one billion more people are currently facing at least one day of "extreme heat stress" annually compared to the 1970s. Subtropical regions now experience up to 50 additional days annually with "strong to extreme heat stress,"