34C Heatwave Expected Across England with Health Alerts in Place 2026

Key Points

• A week-long spell of hot weather is forecast across parts of the UK, with the highest temperatures expected in south-east England.
• The Met Office says temperatures in the south-east could rise to 29C on Sunday and reach 34C on Thursday or Friday.
• The UK Health Security Agency has issued yellow heat health alerts for parts of England from midday on 4 July until 8pm on 11 July.
• The warning covers the east, East Midlands, West Midlands, south-west, London and the south-east.
• Officials say the heat could increase pressure on health and social care services, especially for vulnerable people.
• The alert also warns of a higher risk of water-related incidents, including cold water shock and drowning.
• Temperatures in the south of England were expected to reach 28C on Saturday.
• Meteorologist Becky Mitchell said the heatwave would be prolonged but less hot and humid than the June spell.
• Wales is also expected to see rising temperatures, but no heat health warnings are in place there.
• Met Office projections suggest heatwaves may become more frequent in the future, especially in the south-east of the UK.

UK (Liverpool standard) July 04, 2026 – England is set for another stretch of hot weather, with the Met Office forecasting a week-long heatwave that could push temperatures to 34C in the south-east and trigger health alerts across much of the country. The UK Health Security Agency (UKHSA) has already put yellow heat health alerts in place for several regions of England, warning that the conditions could create minor but meaningful pressure on health services and raise risks for vulnerable people.

As reported by Becky Mitchell of the Met Office, temperatures in the south-east of England were forecast to rise to 29C on Sunday before climbing into the low 30Cs next week. She said the peak of the heat could arrive on Thursday or Friday, when parts of the south-east may reach 34C. Mitchell added that the coming spell would be prolonged, though it would not be as hot and humid as the heatwave experienced last month.

What do the heat health alerts cover?

The UKHSA said its yellow heat health alerts apply from midday on 4 July until 8pm on 11 July across the east, East Midlands, West Midlands, south-west, London and the south-east of England. The agency said the temperatures in the warning area are likely to cause minor impacts on health and social care services, including increased demand from vulnerable people. It also said there is a greater risk to life for the same group, which is why the alerts were issued in advance of the hottest period.

The alert also highlighted a separate safety concern around water. Officials warned that higher temperatures often lead to more people entering rivers, lakes and coastal waters, increasing the risk of cold water shock and drowning. The warning is especially relevant during prolonged hot spells, when people may seek ways to cool down quickly without realising the danger.

How hot will different parts of the UK get?

The Met Office said temperatures in southern England could already reach 28C on Saturday, with London potentially touching 28C as well. On Sunday, the south-east was forecast to rise to 29C, and then approach the low 30Cs as the week progresses. In northern areas, conditions are expected to be less intense, with cloudier skies and spells of rain at times, creating a clear north-south split across the country.

Wales is also expected to see warmer weather, but no heat health warnings have been issued there. According to Mitchell, the heat across southern England and Wales is building gradually, with temperatures climbing through the first half of the week. She said the hottest conditions appear likely on Thursday or Friday, especially in the south-east, where 34C is possible.

What has the Met Office said about this heatwave?

The Met Office has described the incoming spell as a heatwave affecting parts of southern England and Wales. Mitchell said the weather pattern will be more prolonged than extreme, meaning the risk may come from the sustained nature of the heat rather than a short, sharp peak. That distinction matters because longer hot periods can place continued stress on people with underlying health conditions, older adults and those working outdoors.

The forecaster also said the event would not be as hot and humid as the heatwave seen in June. Even so, it is expected to last for around a week, which is long enough to create broader disruption. In practical terms, that can affect travel, outdoor work, school activities and daily routines, particularly if nights remain warm and recovery time is limited.

Why are health officials concerned?

The UKHSA said the warning area is likely to see minor impacts on health and social care services. That includes increased use of healthcare services by vulnerable people and a greater risk to life for those most at risk from high temperatures. Such warnings are intended to help hospitals, care providers, families and local authorities prepare before demand rises.

The agency’s decision comes after the UK experienced another heatwave last week, when extreme heat warnings were already in place. During that earlier spell, records were challenged and in some cases broken, showing how persistent high temperatures have become a growing issue in the UK. The new alert suggests officials are treating this latest surge in heat as a serious public health concern rather than a routine summer warm-up.

What did the recent heatwave reveal?

Last week, the Met Office issued a rare red warning for extreme heat in parts of the country, while the UKHSA placed red heat health alerts in force. It was the first time since the warning system was introduced in 2021 that a red warning for extreme heat had been issued for three consecutive days in the UK. That previous event also produced record-breaking temperatures and prompted concern about the country’s resilience to extreme weather.

The Met Office said the UK set a provisional June temperature record of 37.7C in Lingwood, Norfolk. That exceeded the previous June record of 35.6C, which dated back to 1976, by more than 2C. The figures underline the scale of the recent heat and explain why even a slightly less intense but longer spell is being monitored carefully.

What does this mean for water safety?

The UKHSA specifically warned of a rise in water-related incidents during the heatwave. Hot weather often encourages more people to swim, paddle or cool off in open water, but abrupt entry into cold water can cause shock and increase the risk of drowning. The warning is a reminder that heat can create indirect dangers as well as direct health risks.

This is especially important for families, young people and anyone heading to rivers, lakes, reservoirs or the coast during the school summer period. The danger is not only dehydration and sun exposure, but also unsafe behaviour near water when people are trying to escape the heat quickly. Safety agencies typically stress that open water can remain dangerously cold even during very warm weather.

How does this fit the wider climate trend?

The Met Office says the frequency and intensity of heatwaves has increased worldwide. Its projections indicate that hot spells are likely to become more common in future climate conditions, particularly in south-east England. Temperatures are expected to rise in all seasons, but summer heat is likely to become the most intense.

This wider trend helps explain why heat alerts are becoming more familiar in the UK. What was once treated as an unusual burst of summer warmth is increasingly being managed as a recurring public health issue. For policymakers, that raises questions about preparedness in schools, care homes, transport systems and workplaces.

Background of the Development

The current heatwave warning follows a turbulent period of extreme summer weather across the UK. Last week’s red warnings and record temperatures showed how quickly a hot spell can escalate into a public health emergency, especially for older people, those with long-term illnesses and communities with limited access to cool indoor spaces. The introduction of the alert system in 2021 has made it easier for authorities to warn the public earlier and more consistently.

The latest forecast also reflects a broader seasonal pattern in which southern parts of the UK tend to face the highest temperatures. The south-east, in particular, is repeatedly identified by the Met Office as one of the areas most exposed to future heat extremes. As temperatures continue to rise, official guidance and emergency planning are likely to remain central to how the country manages summer weather.

What Is the Prediction for the Audience?

For people living in the affected parts of England, the most immediate impact is likely to be discomfort, sleep disruption and greater caution around outdoor activity. Vulnerable residents, including older adults, young children and people with existing medical conditions, may need to take extra steps to stay cool and hydrated. Health and care services could also see a modest increase in demand if the forecast holds and the heat lingers through the week.

For the wider audience, this heatwave is likely to reinforce how quickly summer weather can shift from pleasant to potentially hazardous. If the forecasted 34C arrives in the south-east, it may prompt more warnings about travel, water safety and looking after vulnerable neighbours. Longer term, the event may strengthen public awareness that hot spells in the UK are becoming more frequent and more operationally significant.