Welcome to Carbon Brief’s DeBriefed.

An essential guide to the week’s key developments relating to climate change.

UK, Europe and India battle heatwaves ‘MIND-BOGGLING’ MAY: The UK and continental Europe have set “mind-boggingly crazy” temperature records for May amid a deadly heatwave, reported the Financial Times.

According to the Associated Press, the UK “smashed a century-old temperature record for the second time in 24 hours on Tuesday”.

The newswire added that records “also fell in France, where temperatures reached 36C on Monday in the country’s south-west”.

On Wednesday, Portugal hit a record May temperature of 40.3C, said BBC News.

‘BRUTAL REMINDER’: In parts of Italy, the heatwave triggered blackouts, reported Reuters.

The heatwave has also been linked to more than a dozen deaths in the UK and France, including from people drowning and suffering heat-related deaths while competing in sporting events, said ABC News.

Simon Stiell, the executive secretary of UN Climate Change, said the intense heatwaves were a “brutal reminder” of the cost of global warming, reported Politico.

Carbon Brief has in-depth coverage of the record-shattering heatwave.INDIA’S DEADLY HEAT: In the southern Indian states of Andhra Pradesh and Telangana, more than 100 people died within three days following an intense heatwave, reported the Khaleej Times.

The publication noted that authorities urged people to stay indoors and avoid direct exposure to the heat.

Meanwhile, some parts of India are “grappling with power cuts as record-breaking heat has pushed electricity demand ​to an all-time high”, reported Reuters.

Around the world CRUDE DIPS: The International Energy Agency (IEA) said global investments in oil projects will fall below $500bn in 2026, continuing a three-year decline, reported Bloomberg.

Carbon Brief’s analysis of the data shows the US’s “data-centre boom” means it is now investing more in fossil-fuel power than China.

DODGING NET-ZERO: The world’s biggest miner, Australian giant BHP, has backtracked on climate action by halting or delaying projects to cut “vast” amounts of emissions, according to a Guardian investigation.

SOLAR SLIP: China’s new solar installations dropped for a fourth straight month, reflecting weakening domestic demand, said Bloomberg.

NO LOGGING: Deforestation in the Brazilian Amazon fell last year to its lowest level since 2019, according to a new report, said Agence France-Presse.

EXECUTIVE ACTION: Puerto Rico’s governor announced a state of emergency to fight a surge in coastal erosion, citing the need to protect natural resources and vulnerable communities, reported the Associated Press.

Four million The number of homes in the UK with air conditioning, double the figure from three years ago, reported the Guardian.

There are 29m households in the UK.

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LGBTQ+ households in the US are “significantly more likely” to face energy poverty and insecurity than the general population | Energy Research & Social Science Global rice-paddy greenhouse gas emissions have doubled over the past six decades | Nature Food Vegetation greening and human-caused warming are the “main drivers” of a surge in flash floods over the last decade | Science Advances (For more, see Carbon Brief’s in-depth daily summaries of the top climate news stories on Tuesday, Wednesday, Thursday and Friday.) A Carbon Brief investigation has shed light on the impact of weather-related flooding on National Health Service (NHS) facilities across the UK.

At least 67 NHS hospital wards, departments and other sites have been forced to temporarily close or relocate due to weather-related flooding.

The chart above shows sites of weather-related flooding incidents at....