The short version
- A fifth widespread heatwave is expected next week, with yellow health alerts active across most of England until Tuesday.
- Temperatures may exceed 35C in southern regions, potentially breaking the record for days above 30C set in 1995.
- Persistent dry conditions have led to hosepipe bans and concerns over vegetable yields, despite typical August rainfall patterns.
Heat is building across the United Kingdom this weekend, setting the stage for what forecasters describe as the fifth widespread heatwave of the year. Yellow heat health alerts are currently in force for most of England through Tuesday, signaling potential impacts on health and social care services. These warnings highlight an increased risk to life for vulnerable populations as temperatures climb. The UK Health Security Agency is expected to update these alerts in the coming days as the situation develops further.
Temperatures began rising above average levels on Saturday, reaching the mid-to-high 20s Celsius across much of England and Wales. While Scotland and Northern Ireland experienced cooler conditions with cloud cover, rain, and blustery winds, the rest of the country faced significant warming. By Sunday and into the following week, many parts of the UK are projected to exceed their specific heatwave threshold temperatures, which range from 25 to 28 Celsius depending on the location.
The sustained nature of this hot weather means many locations will meet the criteria for a formal heatwave declaration, requiring three consecutive days of elevated temperatures. This marks a significant milestone in an already remarkable summer for the United Kingdom. July was recorded as the sunniest month on record for the UK and the driest July on record for England and Wales, establishing a baseline of extreme weather that continues into August.
Historical records are under pressure as this heatwave progresses. There have been 33 days this year when temperatures exceeded 30 Celsius in the UK. With next week's forecast, it is likely that the record of 34 days, set in 1995, will be broken. Additionally, for the first time in recorded history, a temperature of 35 Celsius has been observed somewhere in the UK during each of the three consecutive months of May, June, and July.
Forecast models suggest that August could join this unprecedented list by the end of next week. Some predictions indicate temperatures reaching 35 Celsius in central and south-east England. If these forecasts materialize, it would underscore a trend of increasingly extreme heat events occurring earlier and more frequently throughout the summer season. The potential for such high temperatures raises concerns about infrastructure strain and public health preparedness.
Dry conditions remain a critical issue across much of the country. Scorched ground is a familiar sight in many areas as the lack of rain continues. Wisley in Surrey has gone 51 days without recording any rainfall, a figure that could easily rise to 60 days given the current forecasts for southern England. While some rain is expected for Scotland and Northern Ireland on Saturday, followed by northern England and north Wales on Sunday, other regions are likely to remain dry.
The persistence of drought conditions means that existing hosepipe bans will show no sign of easing in the near term. This has practical implications for agriculture, with farmers warning that vegetables may become smaller and more expensive due to the hot weather. The lack of significant rain in sight across England and Wales exacerbates these concerns, affecting both domestic water usage and commercial farming operations.
Despite the current dry spell, August is typically the wettest of the summer months across the UK. There are indications that the second half of the month could become unsettled as low-pressure systems become more dominant. However, until such weather patterns arrive, the immediate focus remains on managing the impacts of the ongoing heatwave and drought. The coming days will be crucial in determining whether records are broken and how severe the effects on health and agriculture will be.
Sources behind this briefing
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- BBC News↗Fifth heatwave of the year likely next week as temperatures could hit 35C
