The sweltering heat that brought record-breaking temperatures in June is set to return, with forecasters warning of a prolonged period of high temperatures across southern and eastern England. For the third time this year, the UK is bracing for a heatwave, with the mercury expected to soar to 34C in some areas.
Yellow heat-health alerts have been issued by the UK Health Security Agency (UKHSA) for the Midlands and southern England until 8:00 PM GMT on July 11th. This indicates potential minor impacts on health and social care services, with a heightened risk to vulnerable individuals. Temperatures across the Midlands, East Anglia, and south-east England are expected to reach 31C by Monday afternoon, meeting the official heatwave criteria.
As the week progresses, the heat is set to intensify, with temperatures in England and east Wales climbing into the high-20s and low-30s. London and south-east England will experience the peak of this heat, potentially reaching 34C on Wednesday and Thursday. While some models suggest a possibility of mid-to-high 30s this week, it's unlikely that the all-time UK temperature record of 40.3C set in July 2022 will be broken.
This heatwave differs from its predecessors, with temperatures not expected to reach the same extreme intensity or humidity as seen in May and June. However, its projected longevity is a concern, with forecasts suggesting temperatures exceeding 30C somewhere in the UK for up to 10 consecutive days – longer than the previous two record-breaking events.
The warm conditions are being driven by a significant dry European heat building from Portugal and south-west Spain, where Porto recorded 40.1C over the weekend. As this heat spreads northwards into France, Meteo-France has also warned of intense heat, with temperatures expected to reach mid-to-high 30s and potentially exceed 40C in some southern regions.
For those affected, practical safety advice includes staying hydrated by drinking plenty of water, seeking shade during the hottest parts of the day (11:00 AM to 3:00 PM), wearing light, loose-fitting clothing, and checking on vulnerable friends, family, and neighbours. While northern areas will experience warmer conditions, particularly in western Scotland, cloud and rain are expected to continue, mitigating the impact of the heatwave.
Lower humidity levels and dry soils have raised concerns about an increased risk of wildfires across the country. The UK's fire services and emergency responders are on high alert, urging caution and vigilance during this period.