The red extreme heat warning has been expanded to engulf parts of Sussex and Surrey, as the UK bracing for its hottest day on record. Temperatures are expected to soar above 40°C in some areas, prompting widespread disruption and posing a significant risk to life.
Originally focused on the north of England, from London to Manchester and Yorkshire, the warning now covers a vast swathe of southern England, underlining the far-reaching impact of this historic heatwave. For those living under the red warning, there is a severe threat to health and safety, with extreme disruption anticipated for daily life, transport, and infrastructure.
Across much of England, an amber warning remains in place, indicating a high risk of heat-related illnesses across a significant proportion of the population. Wales and Scotland are expected to experience extremely warm conditions, but without reaching the same danger thresholds as southern England. Northern Ireland will see milder weather, with no extreme heat warnings issued.
The Met Office is urging people to take immediate precautions: drink plenty of water, avoid strenuous activity between 11 am and 4 pm, stay in the shade, and wear light clothing. Vulnerable individuals – the elderly, young children, and those with health conditions – should be checked on regularly by family members or neighbours.
Transport networks are bracing for significant disruption: rail speed restrictions are likely, road travel will be affected due to overheating surfaces, and vehicle breakdowns may increase. Healthcare services are also expected to come under strain as heat-related illnesses rise. The UKHSA has elevated its heat-health alert to Level 4, indicating a national emergency.
With temperatures set to remain high through the night, providing little respite, many areas will see daytime highs consistently above 35°C. Light winds offer minimal cooling, and the Met Office stresses that these exceptional temperatures pose a serious risk to public health and safety.