Environment

National park officials took the precautionary measure to limit tourist access after heavy rain caused the Iguazu River to flow at six times the normal rate

Heavy rainfall fuelled by a supersized El Niño weather pattern briefly forced Argentinian authorities to close tourist access to the famed Iguazu Falls, amid fears that rapidly rising water levels would cause the river to burst its banks.

National park officials took the precautionary measure on Monday when the Iguazu River’s flow exceeded 12,000 cubic metres per second – more than six times its average rate.

World Economic Outlook says states’ oil stocks are low and budgets are overstretched, as it upgrades UK GDP growth forecast for 2026

• Developing nations face triple shock, UN warns

The global economy “could soon test the limits of resilience”, as emergency oil stocks run low and government budgets become overstretched, the International Monetary Fund has warned.

In its twice-yearly World Economic Outlook, the IMF said global growth had withstood the Middle East conflict better than feared over the past six months.

Ana Reyes demands Trump officials explain East Potomac tree cutting and says it will likely cause ‘irreparable harm’

US district judge Ana Reyes on Monday ordered a 24-hour halt to tree cutting at the historic East Potomac golf course while she decides on an emergency order from plaintiffs concerned that Donald Trump’s plans for the course are moving forward despite a pending court case challenging them.

“Tree removal for routine maintenance is not exempt from this order,” Reyes’ wrote. “Plaintiffs are likely to suffer immediate and irreparable harm in the absence of preliminary relief.

Environmental water to the area was halted after a complaint from a private landholder, leading to the deaths of wildlife and sheep

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Freshwater turtles rescued from a dried-up water hole in western New South Wales after the state government cut environmental water to the area are being returned home.

Late last month, 10 broad-shelled turtles and three Murray River turtles were released back into the Gingham water hole in the state’s Gwydir region.

Planting cover crops or perennial plants can protect soil amid potential flooding. Congress must act to protect these practices

As forecasters warn that this year’s El Niño could become the strongest on record, concerns are growing about its effect on agriculture and food security.

The United States will not be hit nearly as hard as Central and South America, the Caribbean, and southern Africa, but severe weather could cause significant crop loss in some parts of the country.

Liz Carlisle is associate professor of Environmental Studies at UC Santa Barbara. She is the author of Healing Grounds: Climate, Justice, and the Deep Roots of Regenerative Farming and co-editor of Living Roots: The Promise of Perennial Foods

Clear skies bring warm days and cold nights to Montenegro, while a low-pressure system moves towards Aegean Sea

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Temperatures fluctuated dramatically in the Balkans last week, with unusually large differences between daytime highs and overnight lows – known as the diurnal range.

An area of high pressure over the region brought prolonged sunshine during the day, while clear skies at night allowed temperatures to drop rapidly as heat escaped into the atmosphere without cloud cover to slow the cooling.

At least four deaths linked to storm amid warnings of flash flooding that could stretch into Appalachians

As what was left of Hurricane Isaias moved north on Sunday, bringing moderate to heavy rainfall across the central Appalachians and the mid-Atlantic region, nearly 396,000 customers across the Florida Panhandle and southern Alabama remained without power.

Heavy rainfall associated with the storm could bring isolated flash flooding and strong wind gusts and remain a threat across the south-eastern US, especially near the southern Appalachians, according to the National Weather Service (NWS). That could bring scattered power outages and downed trees and power lines. Life-threatening surf and rip current conditions were expected to continue along the Gulf and south-eastern Atlantic coasts.

Heat and humidity have led to one of the worst mosquito years in recent history, with West Nile virus at a decade high

Los Angeles might be best known for blue skies, beaches and film premiers — but for the last several years it’s held another, unenviable distinction: the most mosquito-infested city in America.

And this year has been especially nightmarish, thanks to a series of heatwaves and an extra-powerful El Niño. Locals have called it a summer of “living hell” as clouds of mosquitoes swarm backyards and leave diners at open air patios scratching their ankles.

John Mitani spent years studying a huge community of chimpanzees in Uganda. But then things took a dark turn – and his findings stunned the scientific world

John Mitani can still remember the first time he set foot in Uganda’s Kibale national park. The old-growth east African rainforest enveloped him, its canopy stretching to heights of 40 metres. Fruit trees bowed under the weight of African star apples and bountiful Ficus mucuso figs. And then there were the chimpanzees. Furry black blobs darted through the jungle, their raucous calls often deafening.

It was the summer of 1995, and Mitani, a primatologist from northern California, had just come from working with the chimps living in the Mahale mountains of Tanzania. At the time, Mahale was home to the largest known population of chimps, with about 100 individuals. But there were rumours that this section of Kibale – only accessible via a 12-hour drive from the capital, Kampala – might host an even more unusual abundance of apes.

Tories plan to scrap low-carbon housebuilding, Greens back new nuclear reactors, and Labour put oil-drilling decisions on hold

New homes could be built without solar panels, heat pumps and high-grade insulation, leading to higher household bills if the Conservative party wins the next general election.

Kemi Badenoch made scrapping the future homes standard (FHS) one of the central planks of her bid to become the next prime minister at the Tory party conference this week.

The annual month-long festival takes place at a flower farm in the Victorian town of Silvan when tulips and other springs flowers are at their most vibrant

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• Key things to know about Hurricane Isaias

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Florida’s governor, Ron DeSantis, said no requests for search and rescue assistance had been received following Isaias, which he described as “cautiously, a good sign”.

Speaking to Fox News, he said:

I think that may be a sign that people heeded the warnings, took proper precautions. We sure would love to say we have not gotten a report of a fatality yet, and we’ll see what happens.

There’s also a lot of hazards post-storm that people should be careful of, but so far we’ve had a lot of assets in place that have not been called on, which is a good sign. I’d rather be over-prepared, and not have to use them, than not have what you need.”

Hurricane Isaias has weakened to a post-tropical cyclone early Saturday, the National Hurricane Center (NHC) said, after it made landfall in Florida and lashed the US Gulf coast with heavy rain and fierce winds.

The category 2 hurricane hit the coast near Destin, Florida, late on Friday, with maximum sustained winds of 105mph.

The storm is expected to move across Alabama and into the Tennessee Valley, the NHC added, with maximum sustained winds decreased to near 35mph.

Protesters spent months occupying an ancient cottonwood. Then a tense standoff with US border patrol came to a head

A 200-year-old cottonwood tree near the US-Mexico border, known as the “grandmother”, has been destroyed to make way for the construction of Donald Trump’s border wall, despite a months-long effort by protesters trying to save it.

In late July, land defenders began a tree-sit in the ghost town of Lochiel, Arizona, taking turns occupying a platform high in the tree’s canopy. The group remained there for more than 70 days.

Koos Bekker’s Newt estate encompasses luxury hotels, pubs and high street business, with local concerns including flooding

When South African billionaire Koos Bekker bought an old country estate in a sleepy corner of Somerset to turn it into a luxury hotel, residents thought it was a sign their area was on the up.

Walking through his peaceful manicured gardens, which feature a maze of apple trees twisted into perfect shapes using the espalier method, it’s easy to feel that all is well in this quiet, picturesque pocket of England.

Marsala on island’s west coast badly affected after powerful storm approached from Mediterranean

Two tornadoes have struck the coastal town of Marsala in western Sicily, injuring dozens of people, damaging buildings including a school, and overturning cars.

A series of videos began to circulate on Friday morning showing two waterspouts approaching the Sicilian town from the sea as people braced for their arrival.

Changing tide levels, shifting sands and hardened shorelines put waves at risk, affecting more than just surfers

The climate crisis is coming for some of the world’s greatest surf breaks, submerging some as sea level rises and wiping out others as classic breaks get crushed against coastal developments.

Analysis of dozens of famous waves in world surfing reserves (WSR) found more than three-quarters were at high risk because of changing tide levels, hardened shorelines and shifting sands.

The hurricane is first in the Atlantic in what has turned into a very late season. Here’s what forecasters are saying about where Isaias will hit and how hard

Hurricane Isaias, which made landfall on the US Gulf coast Friday night, was forecast to bring a dangerous storm surge, significant rainfall, flooding and strong winds across the US Gulf coast this weekend. Millions of people across several states, including Florida, Georgia and Alabama, were under evacuation orders as officials prepared for the storm. All three states issued states of emergency.

The hurricane, the first in the Atlantic in what has turned into a very late 2026 season, made landfall as a category 2 storm, with sustained winds of 105 mph.

‘The climate issue is the security issue,’ says Turkish minister at Pacific pre-Cop summit in Fiji

Wealthy countries should spend far more on dealing with the climate crisis than the 5% of GDP promised by Nato members for defence because “the climate issue is the security issue”, the host of the next UN summit has said.

But, in comments that are likely to prove contentious, the Cop31 president-designate, Murat Kurum, hedged on whether countries should try to repeat a previous agreement to “transition away from fossil fuels” – the primary cause of the climate crisis – when they meet in Turkey next month.

Liability lawsuits have held tobacco, oil and pharma companies to account in the past. AI investors won’t ignore this threat

The most basic function of government is to protect people from harm. Two growing phenomena – the climate crisis and AI – pose escalating risks of extraordinary harm.

The climate crisis is already causing floods, wildfires, drought and record heat. AI agents are already escaping super-secure environments to hack into systems they’re supposed to avoid.

Robert Reich, a former US secretary of labor, is a professor of public policy emeritus at the University of California, Berkeley. He is a Guardian US columnist and his newsletter is at robertreich.substack.com. His new book, Coming Up Short: A Memoir of My America, is out now in the US and in the UK

Storm expected to make landfall on US’s northern Gulf coast with risk of flash floods and isolated river flooding

Isaias has become the first Atlantic hurricane of the 2026 season, with wind speeds of 80mph and a minimum pressure of 975mb. It is expected to strengthen to a category 2 hurricane as it approaches the US’s northern Gulf coast on Friday, according to the National Oceanic and Atmospheric Administration (NOAA).

As a result of the strong El Niño, it has been a notably quiet Atlantic hurricane season. The first hurricane of the season has not formed this late since 8 October 1905, which pre-dates the satellite era (1960s) for tracking hurricanes that has allowed for more non-landfall hurricanes to be discovered.