The Met Office has expanded an extreme amber heat warning into next week, with parts of the UK expected to endure 'severe' temperatures approaching 38C. The alert, in effect from Monday, June 22, to Thursday, June 25, covers South East England and parts of Wales, and is likely to impact the health and daily lives of residents in the affected areas.
Record-Breaking Temperatures Expected
The incoming heat is a result of a band of pressure migrating from France. Forecasters predict that the current highest temperature on record for June—35.6°C recorded in Southampton in June 1976 and Camden Square in June 1957—will likely be broken. The extreme heat is not expected in Scotland, though residual warm air will move northwards, bringing a warmer but lighter spell.
Met Office Deputy Chief Forecaster Tom Crabtree said: “The forecast heatwave is developing into an impactful severe weather event, with record breaking June temperatures and very high humidity. The combination of heat and humidity will be oppressive and bring impacts across society from public health and infrastructure, to power and water supplies.”
Tropical Nights and Health Risks
Night-time temperatures are set to remain in the low twenties, with consecutive nights not dropping below 20°C—a phenomenon known as a Tropical Night. This will make it difficult for people to recover from the daytime heat, exacerbating heat stress impacts. The warning highlights potential health impacts for the wider population, not just those vulnerable to extreme heat.
Water Safety Concerns
The alert also highlights the potential rise in water safety incidents as people seek respite in coastal areas. Those heading to the sea should be aware that surface temperatures are not as high as in mid-summer. Sudden contact with cold water can lead to shock, raising heart rate and potentially triggering panic.
Samantha Hughes, National Water Safety Partner at the RNLI, advised: “If you find yourself struggling in the water, remember to Float to Live: tilt your head back so your ears are submerged, relax and control your breathing. You may need to gently use your hands to help you stay afloat, and it’s ok if your legs sink—everyone floats differently. Where possible, always choose a lifeguarded beach, and swim between the red and yellow flags. In a coastal emergency remember to call 999 for the coastguard.”
