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UK heatwave: Exact date mercury could hit 38C in FOUR DAY scorcher revealed
Mirror | June 18, 2025 10:39 PM CST

Brits are set to sizzle in soaring 38C heat in a four-day spell of roasting temperatures, new charts predict.

The maps from WXCharts show multiple days with the mercury topping 30C in eastern and southern parts of the country.

Temperatures are set to build and build towards the end of next week with the predicted to break records come the end of the month.

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The maps show parts of the UK as hot as 30C by Saturday 28 June, climbing to 32C the following day. However the real scorching weather is saved for the following day, Monday 30 June with charts forecasting temperatures as high as 38C in the South East and London.

Things should ease off the following day with still-scorching highs of 33C predicted for Tuesday 1 July. If these are accurate the UK will see previous records for the hottest June day smashed. The UK's highest June temperature on record is 35.6°C, recorded in Southampton in 1976.

This would make it the hottest day since summer 2022, which saw records smashed and thousands die as a result of the oppressive temperatures.

Summer 2022 was the joint hottest on record and saw the highest recorded temperature in England at 40.3°C, which prompted the first ever Level 4 Heat-Health Alert (HHA) issued by the UK Health Security Agency (UKHSA).

As warm conditions continue, Britain will be hotter than 30C Honolulu, Hawaii, amid a 1,000 mile-wide "blowtorch" heat plume from the Mediterranean, the latest maps show. The Weather Outlook forecaster Brian Gaze said: "The blowtorch is on the way. Forecast models show temperatures smashing the all-time 35.6C June record. There are astonishing heat signals."

Netweather forecaster Nick Finnis added: "Forecast runs show Sunday and Monday challenging the June 35.6C record, with some showing record-breaking temperatures."

forecaster Tony Wisson said: "Temperatures in the low-30s are likely this weekend. Some forecast models even show temperatures to into the mid-30s by Monday, which is a lower-likelihood scenario."

The UKHSA has said the coming hot weather could see: "Significant impacts are possible across the health and social care services due to the high temperatures including a rise in deaths, particularly among those aged 65 and over or with health conditions. There may also be impacts on younger age groups."

The agency also warned of stretched emergency services and risks to vulnerable people as indoor temperatures soared. It has issued yellow heat alerts for seven regions.


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