The Met Office has issued a rare red weather warning for extreme heat, covering large parts of Wales and England, with temperatures forecast to reach 35°C in Cardiff and 27°C in London. The warning, in effect from Wednesday at 9am until Thursday at 9pm, warns of a high impact on lives and advises people to take immediate action to stay safe.
Warning Details and Affected Areas
In Wales, the red warning covers the area from Swansea in the west to Monmouthshire in the east, including Cardiff and the Valleys. In England, it affects large parts of the Midlands, London, south-west, and south-east. The Met Office describes an exceptional spell of hot and humid weather, with population-wide adverse health effects expected, not limited to those most vulnerable to extreme heat, leading to serious illness or danger to life.
Key Advice from the Met Office
The Met Office's first piece of advice is to keep out of the sun and avoid any exercise between 11am and 3pm when the sun is strongest. Additional advice includes closing curtains in rooms that face the sun, taking water when going out, staying in the shade, wearing sunscreen and a wide-brimmed hat, and entering water gradually to avoid cold-water shock. Travellers are advised to check road conditions or bus and train timetables, take water and a battery-powered fan on public transport, dress in light fabrics and light colours, and watch fellow passengers for signs of distress.
Impact on Infrastructure and Services
The Met Office warns of substantial changes in working practices and daily routines, high risk of failure of heat-sensitive systems and equipment, and potential loss of power and other essential services such as water, electricity, gas, or mobile phone services. Some trains are already delayed or cancelled due to the hot weather, including services between London Paddington and Reading and on routes in south Wales.
Understanding Red Weather Warnings
A red warning is the most severe level of alert issued by the Met Office, indicating dangerous weather with a high likelihood of risk to life. It can lead to failures of critical national infrastructure, such as power outages or road and rail closures. The Met Office advises people to avoid travelling where possible and follow advice from emergency services and local authorities. The Met Office has three warning levels: yellow (potential impact, take precautions), amber (likely widespread impact, protect yourself and property), and red (severe impact, risk to life, take immediate action).
