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Severe High Temperature Warning Expanded as UK Braces for 37C Heatwave

The rare amber alert, only the sixth issued since 2021, signals significant risks to public health and transport infrastructure through Tuesday.

Asude Karataş • 21 Haziran 2026 01:20 • 3 dk okuma • 15 görüntülenme

The Met Office has expanded its severe high temperature warning as a dangerous heatwave approaches the United Kingdom, with forecasters predicting temperatures could climb to 36 or 37 degrees Celsius in parts of southern England and south-east Wales. The amber extreme heat warning, expanded to cover east Wales and much of the Midlands, remains valid until the end of Tuesday and represents only the sixth such alert issued since the warning system was introduced in 2021.

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Unprecedented Heat Spreads Across Southern Regions
Health and Infrastructure Threats Mount

Unprecedented Heat Spreads Across Southern Regions

The intense weather system advancing from continental Europe brings a period of dangerous temperatures to multiple regions across the UK. Sunday is expected to bring the initial wave of heat, with temperatures peaking at 27 to 31 degrees Celsius across the Midlands, Wales, and southern England. Northern England will see slightly cooler conditions, reaching 23 to 24 degrees, while Scotland and Northern Ireland will experience 20 to 22 degrees Celsius away from the far north.

The most severe conditions will arrive Monday and Tuesday, when the amber warning takes effect from 01:00 BST on Monday through 23:59 on Tuesday. Southern England could see temperatures of 35 to 36 degrees Celsius, with some locations potentially exceeding 37 degrees. Critically, some areas may experience temperatures above 30 degrees for six or seven consecutive days, with overnight lows remaining above 20 degrees Celsius—conditions that present substantial health risks.

Health and Infrastructure Threats Mount

The UK Health Security Agency has issued a separate amber health alert warning that rising temperatures could significantly affect health outcomes, particularly among those aged 65 and over or with existing medical conditions. The forecasters warn of widespread impacts on both people and infrastructure, including disruption to travel networks. Water safety officials have also raised concerns, with the Royal National Lifeboat Institution warning of cold-water shock risks, which can cause uncontrollable gasping and rapid panic in swimmers despite water appearing inviting during hot weather.

This heatwave aligns with broader climate patterns observed globally, as meteorologists confirm that extreme heat events are becoming more frequent and intense due to human-induced climate change. The Met Office noted that for a condition to officially qualify as a heatwave, temperatures must exceed regional thresholds—varying between 25 and 28 degrees Celsius depending on location—for three consecutive days. Parts of England and Wales are very likely to meet these criteria beginning Sunday.

What is an amber extreme heat warning and how rare is it?+

An amber extreme heat warning is the highest alert level issued by the Met Office for dangerous heat conditions. It indicates widespread impacts on people and infrastructure are likely. This warning is exceptionally rare—only six have been issued since the system was introduced in July 2021, with the previous one occurring in August 2022.

Which regions are most affected by the severe high temperature warning?+

Southern and eastern England, south Wales, east Wales, and much of the Midlands are under the amber warning. Southern England faces the most extreme risk, with potential temperatures reaching 35 to 37 degrees Celsius on Monday and Tuesday.

What are the health risks during this heatwave?+

The UK Health Security Agency warns that rising deaths are likely, particularly among those aged 65 or over and people with existing health conditions. Additional risks include heat-related illness, disrupted sleep due to high overnight temperatures, and water-related incidents including drowning and cold-water shock.

How long will the amber warning remain in effect?+

The amber extreme heat warning takes effect from 01:00 BST on Monday and remains valid until 23:59 on Tuesday. However, high temperatures are expected to persist for several additional days beyond the warning period.

Is this connected to climate change?+

Yes. The Met Office confirms that the increasing frequency and intensity of heatwaves are consistent with predictions about human-induced climate change. This heat system originates from continental Europe, where an intense hot spell is affecting much of western Europe.

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