It's the start of Britain's third heatwave this summer and areas across the United Kingdom look to be facing yet more sweltering temperatures as we enter July06:59, 08 Jul 2026Updated 07:18, 08 Jul 2026Britain is facing the start of the third heatwave of the summer this week, with weather maps predicting highs of 34C on Thursday (July 9). According to forecasters MetDesk, at least 10 areas of the country will be 30C or hotter at 6pm.‌Southern England is set to see the warmest temperatures, with 34C predicted in the south east. However, the mercury will also climb past the 30C mark in central England and parts of the Midlands.‌It appears 10 counties and regions of the UK will see temperatures above 30C, namely the West Midlands, Lincolnshire, Cambridgeshire, Bedfordshire, Northamptonshire, Buckinghamshire, Oxfordshire, Hertfordshire, Greater London, and Essex.‌Amber heat-health alerts have been issued from the UK's Health Security Agency, for The Midlands, London, eastern and southern England.They are valid from 09:00 on Wednesday 8th July until 21:00 on Sunday 12th July. With similar yellow alerts for northern England, Yorkshire and The Humber.The Met Office predicts London is set to be Britain’s hottest major city on Wednesday, with a high of 32C from 3pm to 8pm. Birmingham will also see temperatures above 30C from 3pm to 8pm, with a high of 32C at 5pm.‌Cardiff and Manchester will both experience 29C weather that day, while it will be cooler but still pleasant in Edinburgh, Glasgow, and Belfast, where the high is expected to be in the mid-20s.Met Office Deputy Chief Forecaster Steven Keates added: “Temperatures this week are not expected to reach the highs we witnessed last month, though parts of southern England in particular are likely to see several days in the low 30s Celsius, and a few places could reach 34-35°C later this week.“Night-time temperatures again will not be as high as what we experienced in June, though some larger urban areas are likely to remain in the high teens Celsius overnight, especially later in the week, and there is a chance that a tropical night (where temperatures do not fall below 20°C) may be recorded in a few places.‌“Much of England and Wales will be hot, and the heat will extend to parts of Scotland and Northern Ireland too, though here peak temperatures are more likely to be in the upper 20s Celsius. With high UV and high temperatures, people should take the usual precautions with the heat and the sun.”The current heatwave is set to last until Sunday evening (July 12). While it is not expected to produce the temperatures seen in late June — when Lingwood in Norfolk recorded 37.7C — it can still be dangerous.Article continues belowA rise in deaths among elderly people is one of the ‘significant impacts’ the UKHSA believes are ‘likely’ to occur.The warning notice said: “Significant impacts are likely across 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.Likely increased demand on all health and social care services.Internal temperatures in care settings (hospitals and care homes) may exceed the recommended threshold for clinical risk assessment.The heat affecting the ability of the workforce to deliver services.Indoor environments overheating increasing the risk to vulnerable people living independently in community and care settings.Issues managing medicines.Staffing issues due to external factors (for example, affecting transport).Increased demand for power exceeding capacity.Other sectors starting to observe impacts (for example, travel delays).Water‑related incidents may increase, including risks from cold‑water shock and drowning.”