The rise in heat and the wildest climate linked to climate change make it "the world's biggest threat to health in the twenty-first century," with hundreds of millions of people who have suffered in the past two decades, medical sources said on Wednesday.
In a journalist report published by the medical journal The Lancet, scientists and health experts said that the impacts of climate change – from heat waves to storms, floods and fires – aggravated and threatened to calm the health systems.
"This is what really keeps me up at night," said Nick Watts, executive director of The Lancet Countdown, an annual report that tracked the links between public health and climate change.
Storms and floods, for example, not only cause direct injuries, but also can close the hospitals, stimulate outbreaks of diseases and cause persistent mental health problems, as people lose their homes, he said.
Strong fires, in the same way, harm and unleash people, but they also drastically worsen air pollution in large areas.
The Lancet report, produced by doctors, academics and policy experts from 27 organizations around the world, called for rapid action to curb climate change and prepare global health systems for the growing challenges.
"A rapidly evolving climate has strong consequences for all aspects of human life, exposes vulnerable populations at the end of time, altering the patterns of infectious diseases and compromising food safety, drinking water and clean air," he warned.