An amber heat-health alert has been issued for the entire UK as temperatures soar to potentially dangerous levels. The previous yellow alert for Somerset has been upgraded to amber, reflecting the forecasted rise in temperatures and health risks.
The UK Health Security Agency and the Met Office have jointly issued the warning, which covers all of England. It comes into effect at noon on Thursday and will remain active until 9 a.m. on June 23. Officials warn that this spell of extreme heat is likely to cause an increase in heat-related illnesses and deaths, particularly among vulnerable populations.
Temperatures are expected to climb to 31°C on Thursday and Friday, reaching a peak of 33°C on Saturday, before slightly easing to the low 30s on Sunday. Somerset will experience highs around 31°C today and tomorrow before the heatwave moves on. Following this intense period, temperatures may plunge by as much as 10°C early next week, although another hot spell could return by the end of June.
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An official heatwave is declared when temperatures surpass region-specific thresholds—ranging from 25°C to 28°C—for three consecutive days. Met Office Deputy Chief Meteorologist Dan Holley described the heat as the “dominant story” of the week, noting that areas across England will see widespread heatwave conditions. He added that some locations may even experience “tropical nights,” where temperatures do not fall below 20°C.
The forecast for the coming days includes dry weather with abundant sunshine and a strengthening southeasterly breeze, making conditions feel very warm. While the evenings may bring some isolated, possibly thundery showers, overall the weekend will remain hot and humid.
Looking ahead to the longer-term forecast, after the weekend’s peak temperatures, cooler and more changeable weather is expected through early July, especially in northwestern areas. However, southern and eastern England will likely continue to experience warmer and drier spells with occasional bursts of hot weather influenced by continental air masses. Thunderstorms may also occur intermittently during this period.
Residents are advised to take appropriate precautions during the heatwave, ensuring they stay hydrated, avoid strenuous outdoor activities during peak heat, and look out for vulnerable individuals in their communities.