The UK Met Office has issued a rare red weather warning for Wednesday and Thursday as extreme heat and humidity are expected to affect large parts of the country.
Areas Affected by the Red Warning
The warning covers southern Wales as far west as Swansea, and an area of England that includes London, running from the inland areas of Kent and Sussex across to Somerset, as far north-west as Birmingham, and as far north-east as southern Cambridgeshire. People in these areas have been urged to take immediate action to protect themselves.
Forecasters stated that the region is likely to see a two- to three-day period where maximum temperatures in the shade exceed 37°C, potentially rising to 38–40°C in some places. High humidity will exacerbate the discomfort and health impacts, with very warm and humid nights reducing the ability for people to recover overnight.
Impacts and Precautions
The Met Office warned of significant disruption to daily life, urging the public to take precautions and adapt their routines. A red weather warning indicates a high degree of likelihood and impact, meaning dangerous weather is expected and immediate action should be taken to keep oneself and others safe. Such conditions pose a genuine risk to life, with substantial disruption to travel, energy supplies, and possible widespread damage to property and infrastructure.
An amber warning also covers almost all of the rest of Wales and most of England across to Cornwall, up to Yorkshire and Lancashire.
Expert Commentary
Bill McGuire, professor emeritus of geophysical and climate hazards at University College London, said temperatures above 43°C are now possible in the UK's current climate, with heatwaves lasting several days. He warned that the country's health services, energy infrastructure, and transport are not built for these conditions, leading to potential power cuts, transport chaos, and overwhelmed hospitals.
Gareth Redmond-King, head of the international programme at the Energy and Climate Intelligence Unit, noted that the upgrade from amber to red is a stark reminder of the danger to health, especially for the vulnerable. He highlighted that the heatwave coincides with MPs debating the UK's net-zero emissions plans, which remain the only scientifically credible solution to halt climate change.
