NewsUK NewsHeatwaveForecasters are warning an even more intense spell of heat could hit the UK during the second week of July, potentially bringing temperatures to a sweltering 41C18:27, 28 Jun 2026The UK could be on course to experience its hottest day ever, with new weather forecasts indicating temperatures may climb to a blistering 41C within days.‌After a week that saw records tumble, forecasters are now warning an even more intense spell of heat could arrive during the second week of July.‌Fresh weather maps suggest parts of the south-east may be among the areas hit the hardest, with temperatures potentially exceeding the current UK record.‌The country has only just emerged from an extraordinary run of soaring temperatures, including the hottest June day in UK history, which came on Friday when the mercury reached 37.3C.Britain's all-time temperature record currently stands at 40.3C, set during the exceptional July 2022 heatwave.‌The first signs of the next hot spell are expected from July 8, when temperatures could reach around 35C across parts of the south east, according to WXCharts.Forecast data indicates much of central and southern England may top 30C, while parts of Yorkshire could also see highs of around 33C.The heat is then expected to intensify. By July 10, weather models indicate temperatures could approach 40C across western and southern England, with widespread highs between 37C and 39C possible across central and southern parts of the country.‌The most extreme conditions are currently forecast for July 11. The GFS model suggests isolated areas of western England could hit 41C, while a broad swathe of England, stretching from Yorkshire to London, may also experience temperatures approaching that level.A heatwave is declared when temperatures reach or exceed the local threshold for three consecutive days.Article continues belowThe threshold varies between 25C and 28C depending on the county, with the highest benchmark for 28C applying in south east England and lower thresholds further north and west.If the July forecasts prove accurate, many areas would almost certainly meet the criteria for an official heatwave.Counties facing 40C or more in JulyYorkshireNottinghamshireLincolnshireLeicestershireDerbyshireNorthamptonshireLancashireCheshireShropshireBedfordshireHertfordshireHerefordshireWorcestershireWarwickshireOxfordshireBuckinghamshireBerkshireSurreyChoose Daily Mirror as a 'Preferred Source' on Google News for quick access to the news you value.‌HeatwaveWeather