The UK Is Burning Through Its Hottest Summer Ever — Here's What's Happening
The UK's weather service, the Met Office, has issued an Amber Extreme Heat warning for England and Wales. Temperatures could reach 37°C, and maybe even 38°C in some places, during the second week of August 2026. This is the country's fifth heatwave of the year, and the summer is on track to be the hottest ever recorded for average temperature. BBC Weather
The warning came on 11 August and fits a pattern that has lasted all summer. In June, the Met Office issued a Red Extreme Heat Warning — the most serious type — after 36.9°C broke the record for the hottest June day in Britain. By mid-August, the UK had seen 34 days where temperatures hit at least 30°C. That ties the all-time record for the most 30°C-plus days in a single year. If temperatures reach 36°C or higher during this heatwave, 2026 will be the first year ever to have four separate days that hot. BBC Weather
Temperatures are expected to go above 30°C across south-east England, with the mid-to-high 20s in other areas. If the 38°C forecast happens, it would equal the summer's highest temperature so far, recorded at Lingwood in Norfolk. The mayor of Greater Manchester, Andy Burnham, was set to lead a COBRA meeting — a government emergency response gathering — about the extreme heat, showing how seriously officials are taking the situation. BBC Weather
The UK is not alone. Across Europe, parts of the continent were going through their fifth heatwave of a summer marked by drought, wildfires, and record-breaking heat. A United Nations agency said on 11 August that extreme heat is becoming more frequent and more intense. Reuters
For the UK, the rest of August only needs to have average temperatures for the whole summer to break the record for the hottest summer — a record that was set just last year, in 2025. BBC Weather
The Met Office wrote on its blog in mid-July that climate change is making extreme heat more likely and more intense. Climate change refers to the long-term warming of the planet, largely caused by human activities like burning fossil fuels, which trap heat in the atmosphere. Met Office
The Met Office uses a colour-coded warning system for extreme heat. Yellow means be aware, amber means be prepared, and red means take action now. An amber warning means there is a higher chance that people could be affected, with possible travel disruption, strain on health services, and risk to those who are more vulnerable, like older adults. The Met Office will update the warning if the forecast changes. Met Office
The warnings have been getting more serious all summer. The Met Office first issued an amber warning in mid-June, then extended it as the forecast became more certain. That heatwave ended with a Red Extreme Heat Warning, with temperatures expected to break long-standing June records. Met Office
The broader context here is that these heatwaves are happening more often and getting hotter. The UK's previous hottest summer was just one year ago, in 2025. The fact that the rest of August only needs to be average to beat that record shows how unusually hot the first half of the summer has been. Each heatwave in 2026 has built on the ones before it, meaning the effects pile up — drying out soil, lowering reservoir levels, and putting stress on roads, railways, and power grids.
The 34 days at or above 30°C matter because many systems are designed around certain temperature limits. Trains face speed restrictions when tracks get too hot, power grids see surges in demand as people turn on air conditioning, and farming suffers as the heat dries out the soil. A fourth day at or above 36°C would put 2026 into territory the UK has never recorded before.
What is worth noting is how slowly official responses have matched the scale of what is happening. The Met Office and a UN agency have both said climate change is driving the trend. The more immediate question is whether the current amber warning will be raised to red, and whether the COBRA meeting led by Mayor Burnham will lead to more local preparations. The Met Office says it will update the warning as the forecast becomes clearer, which means it could be raised if temperatures end up at the higher end of predictions.
