UK Braces for Potential Fourth Heatwave as Temperatures Set to Soar Above 38C in August
Forecasters predict widespread extreme heat, pushing parts of England towards drought conditions and record temperatures.
Image: Eddie Pollard / AI
Callum Smith
The United Kingdom faces the imminent prospect of a fourth heatwave this year, with temperatures forecast to climb significantly above average through late July and into August.
The GFS weather model paints a stark picture, showing extensive dark red areas across much of England on August 4, signaling temperatures more than five degrees Celsius above the long-term average.
A heatwave officially defines itself as a prolonged period of excessively hot and humid weather, lasting three or more days, relative to a specific location's normal climate.
Weather model data suggests several counties could surge past 38C at the start of August; some projections indicate temperatures could widely reach 38-39C across eastern and south-eastern England, including London, on August 6.
The Midlands could see highs of 36-37C, while parts of South Yorkshire might reach 31C, according to GFS model data.
The GFS weather model also indicates temperatures climbing back to 30C next Monday, with southern and western parts of England reaching that mark.
It then predicts 11 consecutive days where temperatures peak at no less than 30C, culminating in an absolute scorcher on August 6.
London, Cambridge, Peterborough, and Ipswich are predicted to reach 32C on July 31.
The historical context of such extreme heat stands stark; the current UK temperature record sits at 40.3C, set during the July 2022 heatwave, a benchmark underscoring the severity of these new forecasts.
In July 2022, the UK declared a national emergency following the Met Office's first-ever red warning for extreme heat.
The official response included activating emergency protocols, establishing cooling centers, and providing public health advisories to mitigate the heatwave's impacts, measures which have informed current preparedness strategies.
Prior to the 2022 record, heatwaves in the UK were infrequent but increasing in intensity, with historical data indicating sporadic events.
The 2022 heatwave broke previous records, with current projections suggesting heatwaves will become more frequent and intense, aligning with global climate change trends and showing a significant departure from historical averages.
The Met Office does not rule out temperatures climbing above 30C in the near future; it suggests further heatwaves are possible, particularly towards the end of August.
Only 13 percent of rivers currently flowing at normal levels for this time of year.
Beyond the immediate heat, the National Drought Group has warned that parts of southern, central, and eastern England are close to experiencing drought conditions, with only 13 percent of rivers currently flowing at normal levels for this time of year.
In response to current low river levels and the predicted heatwave, the National Drought Group and water utility companies have implemented emergency water rationing in Puerto Rico.
They initiated measures to ensure the Rhine River's water levels are monitored closely in Germany, and are making urgent efforts to address the perilously low water levels in Lake Powell, focusing on the potential loss of hydropower generation capabilities.
This impending heatwave places immense pressure on stakeholders across the country; water utility companies face unprecedented demand, and public health services prepare for heat-related illnesses.
Hosepipe bans, already extended to millions, could become even more widespread this summer, as several parts of the country teeter on the precipice of water shortages, impacting daily life and agricultural sectors.
The Met Office outlook for the end of the week suggests mostly fine weather on Friday with more cloud expected, followed by a mixed weekend with some rain.
Showers are expected to move in from the Atlantic on August 1, with northwestern areas most likely to see rainfall; southeastern areas could also experience showers.
The Met Office warns that the end of July could see changeable weather across the UK, with the potential for rainfall to be above average, offering a brief respite before the heat intensifies.
There is also a risk of strong winds at times, particularly if any deeper or larger areas of low pressure develop close to the UK, adding another layer of complexity to the weather landscape.
As the month turns, hints suggest high pressure could return for a time, meaning dry conditions resuming, especially in the south, setting the stage for the predicted August heat.
High pressure is likely to dominate southern regions from August 5 to August 19, leading to dry, settled conditions and solidifying the forecast for prolonged extreme temperatures.