More than 30 countries -- including European nations, the United States, Brazil and China -- took part on Thursday in the first-ever summit held by the United Nations' atomic energy agency to promote nuclear as a "clean and reliable source of energy".

A study that looked at how the immune system reacts to hot weather offers new insight into what's happening when the mercury rises.

The Biden administration announced new automobile emissions standards Wednesday that officials called the most ambitious plan ever to cut planet-warming emissions from passenger vehicles.

The new rules relax initial tailpipe limits proposed last year but eventually get close to the same strict standards set out by the Environmental Protection Agency.

After the mountainside collapsed, obliterating a neighborhood and 43 lives in the worst landslide disaster in U.S. history, Jessica Pzsonka made a promise -– to herself, to her bereft parents and to her late sister, who was buried along with two young sons, her husband and in-laws.

Pszonka would see a permanent memorial created where relatives and visitors could feel her sister's presence and reflect on the serenity that drew the family to Oso, as well as the forces that left an immense scar in the forested Cascade Mountain foothills along the north fork of the Stillaguamish River, 55 miles (89 km) northeast of Seattle.

Global heat records were "smashed" last year, the U.N. confirmed Tuesday, with 2023 rounding out the hottest decade on record, as heatwaves stalked oceans and key glaciers suffered record ice loss.

"The state of the climate in 2023 gave ominous new significance to the phrase 'off the charts'," the World Meteorological Organization said as it published an annual report on the global climate, confirming that last year was the hottest on record, and 2014-2023 was the hottest decade ever measured.

About 700 people were stranded in far northern Australia Tuesday after a tropical cyclone barrelled through their remote community, cutting off links with the rest of the country.

The Australian Defense Force tried to evacuate residents of the small Northern Territory community of Borroloola, but attempts to land aircraft Monday were hampered by wild weather.

Bhavani Mani Muthuvel and her family of nine have around five 20-liter (5-gallon) buckets worth of water for the week for cooking, cleaning and household chores.

"From taking showers to using toilets and washing clothes, we are taking turns to do everything," she said. It's the only water they can afford.

Chinese Foreign Minister Wang Yi said Monday that his country is ready to work with New Zealand to deepen trade and economic ties and address climate change.

Wang met his New Zealand counterpart, Winston Peters, at the start of a tour that will also include Australia.

This winter's record warmth provided the key ingredient for a Midwest outbreak of deadly tornadoes and damaging gorilla hail that hit parts of the Midwest Wednesday and Thursday, tornado experts said.

At least three people were killed in Thursday's tornado outbreak in Ohio, Kentucky, Indiana and Arkansas, which came a day after large hail struck Kansas. It's a bit early, but not unprecedented, for such a tornado outbreak usually associated with May or April, but that's also because of the hottest winter in both U.S. and global records, meteorologists said.

South Sudan is closing all schools starting Monday in preparation for an extreme heat wave expected to last two weeks.

The health and education ministries advised parents to keep all children indoors as temperatures are expected to soar to 45 degrees Celsius (113 Fahrenheit).