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After a surge in temperatures exceeding 30°C (86°F) across certain parts of the UK on Friday, Saturday is expected to offer a brief break from the intense heat. Cooler air moving in from the west should reduce the heat somewhat, though temperatures in south-east England are still forecast to reach highs around 27 to 28°C (81-82°F). Most regions are likely to experience dry conditions with intervals of sunshine and only a slight chance of isolated rain showers.
The discussion about whether a heatwave will be officially confirmed this weekend centers on temperature thresholds. For a hot spell to be classified as a heatwave, measured temperatures must surpass specific limits—ranging between 25 and 28°C (77-82°F) depending on the region—for three days straight. Since parts of south-east England have already had two consecutive days above this mark, the heatwave status could be declared if temperatures remain sufficiently high on Saturday. However, there is some uncertainty as maximum temperatures might not quite reach these qualifying levels. Meanwhile, Scotland, Northern Ireland, Wales, and northern and western England are expected to experience notably cooler weather with highs ranging from 16 to 24°C (61-75°F).
Looking ahead to Sunday, temperatures are set to rise once again with widespread sunny spells. Regions including the Midlands, Wales, and southern England could see highs between 27 and 31°C (81-88°F), while parts of northern England might reach around 23 or 24°C (73-75°F). Scotland and Northern Ireland are forecast to maintain somewhat milder conditions, with temperatures hovering between 20 and 22°C (68-72°F) outside the far north. The presence of high UV radiation and increased pollen levels is expected in several areas.
Extreme heat warnings are on the horizon for early next week. Starting from 01:00 BST on Monday through midnight Tuesday, an amber warning issued by the Met Office will cover much of southern and eastern England as well as parts of south Wales. Temperatures during this period could peak around 34 to 35°C (93-95°F) in south-east England, making an official heatwave declaration highly probable in various locations. Nights are forecast to remain unusually warm, with some areas experiencing tropical nights where temperatures do not fall below 20°C (68°F). This sustained heat may impact public health—particularly for elderly and vulnerable individuals—with risks including sunstroke and heat exhaustion affecting even younger, healthier people. Additionally, there is potential for disruptions to travel and power networks, along with the possibility of scattered severe thunderstorms posing further hazards.
The duration of this heat event remains somewhat uncertain, though forecasts suggest that temperatures might stay near 30°C for up to a week in certain regions, occasionally rising into the mid-30s on some days. This heatwave follows a record-breaking May, which featured the UK’s warmest-ever May day. According to the Met Office, heatwaves are becoming both more frequent and intense worldwide as a result of human-driven climate change. Scientific assessments indicate it is “virtually certain that human influence has increased the occurrence and severity of extreme heat events,” with southern and south-eastern parts of the UK particularly vulnerable. It is important to note that the developing El Niño phenomenon is not responsible for the current hot spell, with its main effects expected later this year and into 2027
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