Temperatures across the United Kingdom are forecast to rise as high as 39 °C [1] this week as a June heatwave reaches its peak.

This spike in temperature poses significant risks to public health and infrastructure. Extreme heat combined with high humidity can increase the risk of heat-related illnesses and strain energy grids during peak cooling periods.

Sky meteorologist Kirsty McCabe said high humidity levels will make the air feel even hotter than the recorded temperature [1]. The heatwave is affecting various regions across the country, including areas such as Middlesbrough and Teesside [2].

Weather patterns indicate that the peak of this heat event will occur during the week of June 23, 2026 [1, 3]. The combination of high temperatures and moisture in the air often creates a "feels like" temperature that exceeds the actual thermometer reading, a phenomenon that can make it harder for the human body to cool itself through perspiration.

Local authorities in affected regions are monitoring the situation as the heatwave intensifies. The forecast of 39 °C [1] represents a severe weather event for the region, requiring residents to take precautions against heat stress, and dehydration.

Meteorologists continue to track the movement of the heat dome affecting Europe and the UK [3]. While the peak is expected this week, the duration of the high-pressure system will determine how long these extreme conditions persist across the British Isles.

“Temperatures are forecast to rise as high as 39 °C this week”

The arrival of 39 °C temperatures in the UK highlights a growing trend of extreme summer weather events in Northern Europe. Because UK infrastructure is historically designed to retain heat rather than expel it, these peaks create a higher risk of heat-related mortality compared to warmer climates. The added factor of high humidity further complicates public health responses, as it reduces the efficiency of natural cooling mechanisms.