Heavy rain in Hong Kong and southern China overnight flooded city streets and some subway stations, with hundreds evacuated and two deaths reported in Hong Kong.

Hong Kong authorities said during a joint news conference Friday that the extreme weather was expected to last until at least midnight, with widespread flooding and heavy disruptions to public transport in multiple districts.

Hurricane Lee whirled through open waters on Thursday as forecasters warned it could become the first Category 5 storm of the Atlantic season.

Lee was not expected to make landfall while on a projected path that will take it near the northeast Caribbean, although forecasters said tropical storm conditions are possible on some islands. Meteorologists said it was too early to provide details on potential rainfall and wind gusts.

Flooding from a cyclone in southern Brazil washed away houses, trapped motorists in vehicles and swamped streets in several cities, killing at least 31 people and leaving 2,300 homeless, authorities said Wednesday.

More than 60 cities have been battered since Monday night by the storm, which has been Rio Grande do Sul state's deadliest, Gov. Eduardo Leite said.

The death toll from severe rainstorms that lashed parts of Greece, Turkey and Bulgaria has increased to 14 after rescue teams in the three neighboring countries recovered seven more bodies.

A flash flood at a campsite in northwestern Turkey near the border with Bulgaria killed at least five people — with three found dead on Wednesday — and carried away bungalow homes. Rescuers were still searching for one person reported missing at the campsite.

Tennis has a fuzzy yellow problem most players don't think about when they open can after can of fresh balls, or when umpires at U.S. Open matches make their frequent requests for "new balls please."

Because tennis balls are extremely hard to recycle and the industry has yet to develop a ball to make that easier, nearly all of the 330 million balls made worldwide each year eventually get chucked in the garbage, with most ending up in landfills, where they can take more than 400 years to decompose. It's a situation highlighted by Grand Slam events like Flushing Meadows, which will go through nearly 100,000 balls over the course of the tournament.

The first African Climate Summit ended with a call Wednesday for world leaders to rally behind a global carbon tax on fossil fuels, aviation and maritime transport, and it seeks reform of the world financial system that forces African nations to pay more to borrow money.

The declaration backed by the leaders of the continent of 1.3 billion people — a population set to double by 2050 — calls on the world's biggest emitters of planet-warming greenhouse gases and its richest countries to keep their promises. It notes especially the unfulfilled pledge of $100 billion annually to developing nations in climate finance, made 14 years ago.

Green hydrogen is being touted around the world as a clean energy solution to take the carbon out of high-emitting sectors like transport and industrial manufacturing.

The India-led International Solar Alliance launched the Green Hydrogen Innovation Centre earlier this year, and India itself approved $2.3 billion for the production, use and export of green hydrogen. Global cooperation on green hydrogen manufacturing and supply is expected to be discussed by G-20 leaders at this week's summit in New Delhi.

The death toll from severe rainstorms that lashed parts of Greece, Turkey and Bulgaria increased to 11 Wednesday after rescue teams in the three neighboring countries recovered four more bodies.

A flash flood at a campsite in northwestern Turkey near the border with Bulgaria killed at least four people — with two found dead Wednesday — and carried away bungalow homes. Rescuers were still searching for two people reported missing at the campsite.

Earth has sweltered through its hottest Northern Hemisphere summer ever measured, with a record warm August capping a season of brutal and deadly temperatures, according to the World Meteorological Organization.

Last month was not only the hottest August scientists ever recorded by far with modern equipment, it was also the second hottest month measured, behind only July 2023, WMO and the European climate service Copernicus announced Wednesday.

Police ordered vehicles off the streets of three regions in Greece Tuesday as a severe storm hammered the center of the country and some of its islands, turning streets into flooded torrents.

Traffic was banned in the central town of Volos, the nearby mountain region of Pilion and on the island of Skiathos until the storm subsides, police said.