A significant heatwave is building across the UK, with temperatures forecast to peak at 34°C later this week. The UK Health Security Agency (UKHSA) has responded by issuing a yellow heat-health alert for most of England, effective from Monday morning through to Sunday evening. The alert covers the East Midlands, East of England, London, the South East, the South West, the North West, West Midlands, and Yorkshire and the Humber.
The spike in temperatures is being driven by a plume of hot air moving north from the continent. High pressure is settling over the UK, bringing a prolonged period of dry, settled weather with strong June sunshine. While the peak of 34°C is most likely in parts of the South East or London, widespread highs in the high 20s to low 30s are expected across much of England and Wales. Crucially, nighttime temperatures are also forecast to remain elevated, potentially staying in the high teens or low 20s Celsius in urban areas, offering little respite from the heat.
The yellow alert issued by the UKHSA is the second tier in a four-level system. It signifies that the heat is likely to affect vulnerable groups — particularly the over-65s, those with underlying health conditions, and people who live alone. At this level, health and social care services are advised to increase readiness and implement precautionary measures. The alert remaining in force for a full week underscores the duration of the event; prolonged exposure to heat is often more dangerous than a single hot day because the body struggles to recover overnight.
For the general public, the impacts extend beyond simple discomfort. Transport infrastructure can suffer; rails expand in extreme heat, leading to speed restrictions and potential cancellations, while road surfaces may soften. The Met Office has also highlighted elevated UV levels, meaning unprotected skin can burn quickly. Air quality often deteriorates during stagnant high-pressure events, posing risks for asthma sufferers. Employers have a duty of care to ensure indoor workplaces remain at reasonable temperatures, and schools may adjust schedules or uniform policies.
Officials are urging people to check on vulnerable neighbours, friends, or relatives daily. Practical advice includes keeping curtains closed on rooms facing the sun, staying hydrated, avoiding strenuous activity during the hottest part of the day (typically 11am to 3pm), and never leaving people or animals in parked cars. While the heatwave is expected to break down next week as Atlantic weather systems return, the coming seven days require vigilance, particularly for those most at risk.
Image: Photo: Anton Kudryashov · Pexels
Based on reporting from bbc.co.uk.
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