Forced to start picking grapes much earlier than normal because of torrid temperatures, winemakers across France are worrying that grape quality will suffer from the climate-induced stress.

The exceptionally dry conditions spread from the rugged hills of Herault along the Mediterranean, where picking is already underway, to the normally verdant Alsace in the northeast.

Once, a river ran through it. Now, white dust and thousands of dead fish cover the wide trench that winds amid rows of trees in France's Burgundy region in what was the Tille River in the village of Lux.

From dry and cracked reservoirs in Spain to falling water levels on major arteries like the Danube, the Rhine and the Po, an unprecedented drought is afflicting nearly half of the European continent. It is damaging farm economies, forcing water restrictions, causing wildfires and threatening aquatic species.

Firefighting teams and equipment from six EU nations started to arrive in France on Thursday to help battle a spate of wildfires, including a fierce blaze in the parched southwest that has forced thousands to evacuate.

Torrential rains across southwestern Yemen and the country's capital of Sanaa have triggered flashfloods and collapsed homes, killing at least 38 people over the past two days, officials said Thursday.

Scores of homes in Sanaa and the provinces of Dhamar and Ibb have completely collapsed or have been significantly damaged, said the officials, who spoke on condition of anonymity because they were not authorized to talk to the media.

Landfills are releasing a significant amount of planet-warming methane into the atmosphere from the decomposition of waste, a study suggests.

Scientists used satellite data from four major cities worldwide — Delhi and Mumbai in India, Lahore in Pakistan and Buenos Aires in Argentina — and found that city-level emissions in 2018 and 2019 were 1.4 to 2.6 times higher than earlier estimates.

Africa's national parks, home to thousands of wildlife species such as lions, elephants and buffaloes, are increasingly threatened by below-average rainfall and new infrastructure projects, stressing habitats and the species that rely on them.

A prolonged drought in much of the continent's east, exacerbated by climate change, and large-scale developments, including oil drilling and livestock grazing, are hampering conservation efforts in protected areas, several environmental experts say.

More than 1,000 firefighters were struggling Thursday to contain a major wildfire which has burned a large area of pine forest in southwestern France, in a region that was already ravaged by flames last month.

Local authorities said more than 68 square kilometers (26 square miles) have burned since Tuesday in the Gironde region and neighboring Landes as France, like other European countries, swelters through a hot and dry summer.

Climate hazards such as flooding, heat waves and drought have worsened more than half of the hundreds of known infectious diseases in people, including malaria, hantavirus, cholera and anthrax, a study says.

Researchers looked through the medical literature of established cases of illnesses and found that 218 out of the known 375 human infectious diseases, or 58%, seemed to be made worse by one of 10 types of extreme weather connected to climate change, according to a study in Nature Climate Change journal.

Rainwater everywhere on the planet is unsafe to drink due to levels of toxic chemicals known as PFAS that exceed the latest guidelines, according to a new study by Stockholm University scientists.

A fire that destroyed thousands of hectares of tinder-dry forest in southwest France has flared again amid a fierce drought and the summer's latest heat wave, officials said Wednesday.

An additional 6,000 hectares (15,000 acres) of pine forest have burned in the so-called Landiras blaze since Tuesday afternoon, forcing the evacuation of some 3,800 people," Gironde regional officials said in a statement.