Human-caused global warming made July hotter for four out of five people on Earth, with more than 2 billion people feeling climate change-boosted warmth daily, according to a flash study.

More than 6.5 billion people, or 81% of the world's population, sweated through at least one day where climate change had a significant effect on the average daily temperature, according to a new report issued Wednesday by Climate Central, a science nonprofit that has figured a way to calculate how much climate change has affected daily weather.

There are now more golden lion tamarins bounding between branches in the Brazilian rainforest than at any time since efforts to save the species started in the 1970s, a new survey reveals.

Once on the brink of extinction, with only about 200 animals in the wild, the population has rebounded to around 4,800, according to a study released Tuesday by the Brazilian science and conservation nonprofit Golden Lion Tamarin Association.

Iran announced a nationwide two-day holiday because of increasing temperatures, state media reported Tuesday.

Government spokesperson Ali Bahadori Jahromi said the decision to close governmental offices, banks and schools on Wednesday and Thursday came after the health ministry warned about a possible increase in cases of heat exhaustion because of high temperatures in the country, the official IRNA news agency reported.

Jan Pappas and Ronald Yasuda hired a contractor to fasten the roof of their 1960s-era home to their walls with metal plates and nails so high winds of a potential hurricane wouldn't blow it away.

Their motivation? Global warming fueling natural disasters around the planet.

At about summer's halfway point, the record-breaking heat and weather extremes are both unprecedented and unsurprising, hellish yet boring in some ways, scientists say.

Killer heat. Deadly floods. Smoke from wildfires that chokes.

Crews battled "fire whirls" in California's Mojave National Preserve this weekend as a massive wildfire crossed into Nevada amid dangerously high temperatures and raging winds.

The York Fire was mapped at roughly 120 square miles (284 square kilometers) on Monday night, with no containment.

Chinese state media report 11 people have died and 27 are missing amid flooding in the mountains surrounding the capital Beijing.

Days of heavy rains have prompted authorities to close train stations and evacuate people in vulnerable communities to school gyms, state broadcaster CCTV reported Tuesday. Homes have been flooded, roads torn apart and cars piled into stacks.

A massive wildfire burning out of control in California's Mojave National Preserve was spreading rapidly amid erratic winds, while firefighters reported progress against another major blaze to the southwest that prompted evacuations.

The York Fire that erupted Friday near the remote Caruthers Canyon area of the vast wildland preserve crossed the state line into Nevada on Sunday and sent smoke further east into the Las Vegas Valley.

As Denver neared triple-digit temperatures, Ben Gallegos sat shirtless on his porch swatting flies off his legs and spritzing himself with a misting fan to try to get through the heat. Gallegos, like many in the nation's poorest neighborhoods, doesn't have air conditioning.

The 68-year-old covers his windows with mattress foam to insulate against the heat and sleeps in the concrete basement. He knows high temperatures can cause heat stroke and death, and his lung condition makes him more susceptible. But the retired brick layer, who survives on about $1,000 a month largely from Social Security, says air conditioning is out of reach.

Phoenix sizzled through its 31st consecutive day of at least 110 degrees Fahrenheit (43.3 Celsius) and other parts of the country grappled Sunday with record temperatures after a week that saw significant portions of the U.S. population subject to extreme heat.

The National Weather Service said Phoenix climbed to a high of 111 F (43.8 Celsius) before the day was through.