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Heatwaves have grown hotter and stronger as the planet has warmed, making what doctors call a "silent killer" even more dangerous. How worried should we be about heat – and how can we stay safe as the climate changes?The Human Cost of Extreme HeatHot weather kills an estimated half a million people each year. The average annual death toll is greater than that from wars or terrorism, but smaller than that from cars or air pollution.Despite this, heat is rarely listed as the cause of death. That's because extreme temperatures are largely indirect killers. Most heat victims die early from illnesses – such as heart, lung and kidney disease – that are made worse in warm weather.The Physiological Impact of Heat StressHigh heat stresses the human body, sending the heart and kidneys into overdrive as they work to keep the body cool. The added strain – particularly for those with chronic illness – can prove fatal even before heatstroke hits.There are also secondary health effects from high heat. Heatwaves lead to more accidents, dirtier air, bigger wildfires and more frequent power outages, all of which can increase the burden on health systems.The Critical Role of Nighttime TemperaturesWhen days are too hot to function and nights are not cool enough to recover, the body is unable to rest. This compounds the damage done during scorching days.In many European countries, meteorologists describe nights with temperature minimums above 20°C as "tropical", while in Spain, which is more familiar with extreme heat, they call nights above 25°C "equatorial" or "torrid". In recent years, they have informally introduced a new category for night-time temperatures above 30°C: "hellish".Identifying Vulnerable PopulationsPeople who are forced to be outdoors in scorching weather – builders, farmers, rough sleepers etc – are most likely to suffer from heat exhaustion and the heatstroke that can follow.But older people, and particularly those with underlying illnesses, make up the bulk of heat-related deaths. Women are more likely to die from heat-related causes than men. Poorer people – who are less likely to have air conditioning, well-insulated homes or access to green spaces – are also at greater risk.The Humidity FactorSweat is the body's best defence against heat, lowering internal temperatures as it evaporates. But when humidity is high and the air hot and sticky, the body struggles to cool down because sweat clings to the skin. The effect this has on perceived temperatures can be equal to several degrees, enough to spell the difference between life and death.Climate Change and Escalating HeatwavesMore than a century's worth of fossil fuel pollution has clogged the atmosphere, trapping sunlight and heating the whole planet. Average global temperatures have risen by about 1.3°C since preindustrial times – and land temperatures by even more – which has pushed the baseline higher and made punishing extremes far more common.There is also some evidence that the climate crisis is making heatwaves worse by weakening the jet stream. Scientists think this is increasing the occurrence of heat domes, which are areas of high pressure and heat that get stuck over a region for days or even weeks.The Net Effect of Rising TemperaturesCold weather kills far more people than hot weather today, even in warm regions such as sub-Saharan Africa and south Asia. But as temperatures rise, the number of deaths from heat is projected to grow much faster than the number of lives saved from milder cold. When scientists modelled this in 854 European cities, they found a net increase in temperature-related deaths under all emissions scenarios, even accounting for how people adapt.Adapting to a Hotter FutureCutting fossil fuel pollution is the biggest step that can be taken to stop heatwaves from getting even hotter, along with protecting forests and wetlands that suck carbon dioxide out of the atmosphere.Urban planners have called for cities to be redesigned so they have less concrete and fewer cars, and more parks and water. This can negate the urban heat island effect, which makes cities hotter than their rural surroundings.Buildings with air conditioning or passive cooling can bring down death tolls, as can strong healthcare systems and swift emergency warnings.The Air Conditioning DilemmaAir-conditioning units increase planet-heating emissions if the power they consume is generated by burning fossil fuels, as it mostly is today, but their pollution is falling as countries clean up their electricity grids. Some experts cite the scale of the heat-related death toll as a worthy reason to use more air conditioning – particularly for the most vulnerable groups – even if it pushes temperatures higher.This year, the UK's Climate Change Committee (CCC) recommended that air conditioning be installed in all care homes and hospitals within the next 10 years, and in all schools within 25 years.Personal Safety StrategiesThe simplest advice is to stay out of the heat: avoid going outside during the hottest parts of the day, and stay in the shade if you have to. To keep your home cool, close windows during the day and open them after dark, when outdoor temperatures fall below inside temperatures. Cover windows with blinds or curtains to block out direct sunlight.Doctors also recommend drinking water frequently, wearing loose clothing and checking on vulnerable people in your community.

The LeadRachel Reeves is preparing to announce a planning shake-up that would fast-track clean energy and infrastructure projects by curbing judicial reviews, the Treasury said.The Planning Reform DetailsThe chancellor will propose that parliament should be able to designate and approve the most important clean energy projects as of "critical national importance", as part of a wider package seeking to blunt the impact of the Iran crisis."That would reduce the exposure from judicial review on all but human rights grounds," the Treasury said.It comes as pressure grows on the government to accelerate its energy infrastructure development to meet its goal to build a virtually zero-carbon power system by 2030.The Renewable Energy LandscapeRenewable energy developers have long bemoaned the difficulty in gaining planning permission for projects, from offshore windfarms to onshore solar and battery storage developments, and waiting times to connect to Great Britain's electricity grid.A spokesperson for the Treasury said that vital infrastructure delivery had been "delayed by judicial reviews of projects the country needs."They added: "The chancellor won't stand for it any longer and is bringing forward bold changes to support delivery. She is clear that parliament must take back control – to get Britain building the power plants, windfarms and grid connections that will bring bills down, strengthen our energy security, and deliver growth in every part of our country."The Current State of Renewable Energy ApprovalsLast year a record number of renewable energy projects were given the go-ahead in Great Britain, according to analysis by the consultancy Cornwall Insight. It found that the energy capacity of new battery, wind, and solar projects that received approval climbed to 45GW, 96% higher than in 2024.However, it also found the pace of projects starting up lagged behind, largely as a result of long construction timelines and grid connection delays.The Broader Infrastructure ApproachFor other infrastructure, such as transport and water projects, the government will introduce a fixed legal challenge window. When this ends, planning consent could be updated to address "any legitimate issues", the Treasury said.The Political ContextThe proposal comes amid a series of policy moves by Reeves despite uncertainty around the future of Keir Starmer as prime minister.On Tuesday it emerged that the government asked UK supermarkets to consider freezing the prices of some essential foodstuffs to protect the public from inflation fuelled by the Middle East conflict.Reeves is expected to announce measures to help households with the cost of living on Thursday, on which she is also planning to cancel a planned rise in fuel duty.

The Mayor’s Call to Stop Athens from Becoming a Giant HotelHaris Doukas, elected in 2024, told the Guardian that Athens “cannot operate as if it were a giant hotel.” He announced a plan to use a pending tourism land‑use bill to ban new tourist‑focused businesses in the historic centre, aiming to protect residents’ quality of life.Tourist Surge and Infrastructure Strain: Numbers Behind the CrisisMore than 8 million visitors arrived in Athens in 2025, a record for the city.Short‑term rentals in the Plaka district have more than doubled since 2018.The municipality serves 700,000 residents while accommodating the tourist influx.Doukas highlighted ongoing upgrades – new electricity grids, water systems, drainage and 5G networks – to cope with the pressure.Economic and Housing Impact: Rising Rents, Short‑Term Rentals, and Public ServicesProperty rents have surged, pricing many locals out of historic neighbourhoods.Short‑term rentals reduce the stock of affordable long‑term housing, exacerbating a housing crisis.Under Doukas, the city has planted an estimated 3,855 trees across its 15 sq mile (39 sq km) area.Policy Pushback and Regional Comparisons: From Barcelona to EU Housing ActionThe mayor’s proposal has found unexpected allies, including Evgenios Vassilikos, head of the hoteliers’ association, who cites Barcelona’s moratorium on new hotel licences since 2017. Both Athens and Barcelona are part of a 15‑city European housing action plan urging the EU to address the housing‑tourism clash.What Comes Next? Potential Legislation and the Future of Athens’ City CentreDoukas aims to embed a blanket ban on new tourist‑related businesses in law, potentially freezing hotel construction permits and curbing short‑term rentals. If passed, the legislation could redirect investment to less‑congested districts, preserve historic authenticity, and set a precedent for other overtouristed capitals.

President Donald Trump announced that a U.S. negotiating team will travel to Islamabad, Pakistan on Monday for a second round of talks with Iranian officials. The move follows a failed session led by Vice President JD Vance and comes as the two‑week cease‑fire, set to expire on Wednesday, is under strain.The administration’s ultimatum – “knock out every single power plant and every single bridge in Iran” – signals a potential escalation that could cripple Iran’s electricity grid, which supplies roughly 20 million people. If all 23 power plants (the approximate number in Iran’s grid) were disabled, the immediate loss of electricity could translate into an economic shock of several billion dollars, given the country’s $150 billion annual GDP.Iran’s foreign ministry, via spokesman Esmaeil Baqaei, condemned the U.S. naval blockade as “unlawful and criminal,” labeling it a war crime. The blockade has already forced 23 ships to turn around, according to U.S. Central Command, tightening pressure on the strategic Strait of Hormuz.Key developmentsMonday – U.S. delegation departs for Islamabad.Tuesday – Expected phone call between Pakistan’s Foreign Minister Mohammad Ishaq Dar and Iran’s Foreign Minister Abbas Araghchi.Wednesday – Two‑week cease‑fire expires; risk of renewed naval confrontations.Iranian officials, including Deputy Foreign Minister Saeed Khatibzadeh and Parliament Speaker Mohammad Bagher Ghalibaf, warned that “significant gaps” remain and described U.S. nuclear demands as “maximalist.” The IRGC Navy announced the re‑closure of the Strait of Hormuz, stating it will stay shut until the blockade is lifted.Takeaway: The upcoming Islamabad talks are a critical diplomatic juncture. Failure to reach a deal could see the U.S. expand its blockade, further disrupt global oil flows through the Strait of Hormuz, and potentially trigger large‑scale infrastructure attacks in Iran.

More drilling in the North Sea will not enhance the UK’s energy security, a group of former senior military leaders told The Guardian on Monday, as the Conservative Party’s energy minister Kemi Badenoch launched a campaign to revive offshore oil and gas licences. The veterans, including retired Rear Admiral Neil Morisetti, a climate‑security professor at University College London, warned that extracting the remaining hydrocarbons “is not the answer” to the country’s rising energy costs and geopolitical vulnerability. Morisetti emphasized that global market forces, not domestic production, set fuel prices and that reliance on imports leaves the UK exposed to “structural chokepoints” such as the Strait of Hormuz or insurance withdrawals. He urged the government to focus on a rapid transition to a diversified mix of wind, solar, tidal and nuclear power, alongside a major renewal of the electricity grid and expanded storage capacity. A recent E3G think‑tank report supports this view, stating that “structural chokepoints” in oil and gas supply chains mean that increasing fossil‑fuel output anywhere does not improve national security. The report highlights that reducing reliance on imported hydrocarbons through electrification, efficiency, and domestic clean energy offers the most durable protection against supply shocks. Maria Pastukhova, senior policy adviser at E3G, explained that while clean‑energy systems are not immune to disruptions, they shift control “under domestic ownership,” lowering exposure to geopolitical and market volatility. Data cited by the report show that the North Sea is a “mature basin” whose output has fallen 75 % since its peak. New licences granted between 2010 and 2024 have produced only 36 days of gas, according to research by the Uplift campaign and consultancy Voar, underscoring the limited impact of further drilling. Retired Lt Gen Richard Nugee compared the UK’s situation to recent developments in Spain, where electricity prices are increasingly set by renewables rather than fossil fuels, reducing dependence on vulnerable chokepoints. He argued that “going for renewables gives greater independence, greater sovereignty, less vulnerability to attack and more opportunity,” contrasting it with the finite and externally‑controlled nature of gas supplies. Experts such as Khem Rogaly of the Transition Security Project warn that reliance on “expensive and volatile fossil fuels” makes British households vulnerable to shocks from global conflicts, including US‑led oil wars. James Meadway, director of the Verdant think‑tank, added that the war in Iran has revealed the fragility of large, centralized power systems to both kinetic attacks and cyber‑threats, reinforcing the case for a more distributed energy architecture. In sum, the former military leaders and independent analysts concur that the only credible route to lasting UK energy security lies in **accelerating renewable deployment, improving efficiency, and modernising the grid**, rather than expanding North Sea drilling.

The military campaign launched by the United States and Israel against Iran has entered its 24th day, bringing the region to a precarious juncture. As US President Donald Trump’s 48-hour ultimatum for Iran to reopen the Strait of Hormuz approaches its expiration at 23:44 GMT on Monday, Tehran has issued stern warnings regarding the potential targeting of its electricity grid. In response, Iran has vowed to strike the energy and water systems of its Gulf neighbors, raising fears of a broader regional energy crisis.The conflict is already having tangible repercussions on the global economy. Financial markets are reacting sharply to the escalating tensions, with stocks in China and Hong Kong on track for their worst performance in nearly a year. The uncertainty has fueled stagflation fears, prompting UK Prime Minister Keir Starmer to convene an emergency meeting to address the mounting economic fallout.In Iran, the situation remains volatile. The Israeli military has conducted a wide-scale wave of strikes targeting infrastructure across Tehran, resulting in powerful explosions reported in the central, southern, and eastern parts of the capital. Verified footage shows massive columns of fire and smoke rising over Karaj following an air attack. The Iranian Revolutionary Guard Corps (IRGC) has retaliated by threatening attacks on power plants in Israel and those supplying electricity to US bases, while also targeting a turbine engine production site in Qom used for drone components.The conflict has also spilled over into Gulf Cooperation Council (GCC) nations. Saudi Arabia’s Ministry of Defence confirmed that two ballistic missiles were launched toward Riyadh, with one intercepted and the other falling in an uninhabited area. The UAE reported debris injuries in the al-Shawamekh area, while Bahrain confirmed attacks on the US Fifth Fleet. In Qatar, seven people were killed in a helicopter crash, and Kuwait has formally protested airspace violations to the International Civil Aviation Organization.The human toll continues to rise. In Israel, alerts were triggered across Jerusalem and central Israel following explosions, with the casualty toll from attacks on Dimona and Arad climbing to at least 180 injured. In Lebanon, authorities report that at least 1,029 people have been killed since March 2, with over 100 of the victims being children. In Iraq, at least 60 people have been killed, primarily among pro-Iran Popular Mobilisation Forces.

Iran has issued a stark warning to Gulf countries, threatening 'irreversible destruction' of their water infrastructure if the US follows through on its threat to attack Iran's electricity grid. This move has raised fears of a severe disruption to water supplies in the region, which heavily relies on desalination plants for drinking water.The Gulf countries, including Saudi Arabia, United Arab Emirates, Qatar, Bahrain, Kuwait, and Oman, are highly dependent on these plants, with some countries relying on them for up to 90% of their water supply. For example, Kuwait gets 90% of its water from desalination plants, while Saudi Arabia relies on them for around 70%.Desalination plants are considered critical civilian infrastructure in the Gulf, as they turn seawater into drinking water through a process called reverse osmosis. These plants are situated on the coast, making them an easy target for an Iranian attack, and disabling them would have a significant impact on civilian populations and industries.Iran has already followed through on a similar threat in the past, targeting a desalination plant in Bahrain after one of its own plants was hit. Analysts have warned that any disruption to water infrastructure could trigger a major escalation in the conflict, given the potential economic and civilian impact.The impact of targeting desalination plants would be severe, with most Gulf countries only having water reserves to last around a week. If plants are struck and capacity is taken out, the impact would be quick and severe, potentially wiping out water supplies to major cities in a matter of days.