It's Really, Really Hot — and It's Breaking Things Across Europe
On 13 August 2026, the UK Met Office issued an amber extreme heat warning for a large part of England, stretching from London to Sheffield. The warning covered areas including the South East, East Midlands, East of England, West Midlands, and South Yorkshire, and lasted from 9am to midnight that Thursday. Met Office forecaster Alex Burkill said temperatures could reach around 36, 37, or possibly 38°C. If temperatures go above 38°C, it would be the hottest day of the year so far in the UK. If they exceed 38.5°C, it would be the hottest August day ever recorded, though Burkill said that was unlikely (The Guardian).
An amber weather warning means that severe weather is likely and could cause problems — like travel delays, road and rail closures, power cuts, and even risk to life and property. A red warning, the highest level, means dangerous weather is expected with a very likely risk to life, major disruption to travel and energy, and possibly widespread damage (Met Office). Notably, the Met Office's own UK warnings page showed a notice saying it was experiencing issues and that the warnings shown may be out of date.
This is not the first heat warning this summer. The Met Office had already issued amber extreme heat warnings as early as June 2026, with temperatures widely exceeding 35°C (Met Office). A blog post dated 12 August confirmed that an amber extreme heat warning had been issued for parts of central, eastern, and southeastern England for Thursday (Met Office).
On the European continent, the heatwave has done more than make people uncomfortable. Romania began shutting down its only nuclear power plant, Cernavoda, after water levels in the Danube river fell to a record low. Nuclear plants need large amounts of water to keep their reactors from overheating. When the river is too low, the plant cannot operate safely. Romania's state nuclear company Nuclearelectrica had already shut down one of the plant's two reactors in July 2026. The second reactor now had to shut as well because of what the company described as the significant and ongoing drop in the Danube's water level (The Guardian).
Romanian authorities had tried unusual engineering measures to avoid a full shutdown. They blew up a rock formation and sank four barges filled with rocks to push the Danube's water toward the plant. Those efforts were not enough against the steady decline in river levels.
The Cernavoda shutdown has immediate effects on Romania's electricity supply. Losing both reactors removes a major, steady source of power from the national grid just when people are using more electricity for air conditioning and cooling. Romania will now depend more heavily on natural gas, coal, and imported electricity to fill the gap, at a time when European energy markets remain sensitive to supply disruptions.
Spain is also dealing with extreme heat. AEMET, Spain's state weather agency, issued an "important danger" warning for temperatures up to 40°C in Sierra norte de Sevilla on 13 August 2026. AEMET also issued an "important danger" warning for 40 mm of rain in one hour in Gúdar y Maestrazgo-Teruel on 10 August 2026. That second warning shows the heatwave is also creating conditions for sudden storms and flash floods. Spain experienced its first official heatwave of 2026 earlier in the summer, and in June AEMET issued red and orange alerts across several regions warning of temperatures exceeding 39 to 40°C (Reuters). By 26 June, health authorities across Europe were on high alert as the heatwave moved east and south, prompting measures including alcohol bans (Reuters).
In the UK, the political response is turning toward prevention. UK Prime Minister Andy Burnham said the government will look at banning disposable barbecues as wildfires continued to burn across the country. A discarded disposable barbecue was identified as the probable cause of a large woodland fire in Macclesfield, Cheshire, in July 2026. That fire required dozens of firefighters to bring under control (The Guardian).
The broader context here is that extreme heat is hitting multiple parts of Europe's infrastructure at the same time. The UK warning covers densely populated areas from London through the Midlands to South Yorkshire. Romania's nuclear shutdown shows how heat and drought can take offline a major clean power source just when people need electricity the most. And Spain's warnings for both extreme heat and heavy rain show how this summer's weather can swing between different kinds of danger.
What bears watching is whether the Danube's water levels recover enough to allow at least one Cernavoda reactor to restart before autumn, whether the UK's disposable barbecue consideration turns into actual law, and whether the Met Office upgrades its amber warning to red if temperatures push toward the 38.5°C threshold Burkill described as unlikely but not impossible.
