Amber heat health alerts have been extended to the north of England as temperatures reached 35.5C (95.9F) on Thursday, marking a record for the most days in a year with temperatures at or above 34C. The alerts now cover nearly all of England, signaling potential impacts on health services and travel disruptions through Sunday evening.
Thursday's high temperature in Surrey meant the UK has now recorded eight days this year with temperatures reaching or exceeding 34C, surpassing the previous record of seven days in 1976 and 2020. Another day with temperatures at or above 34C is anticipated on Friday as the heatwave peaks.
Commuters experienced delays and cancellations on rail services Thursday evening, and NHS England reported sustained pressure on its ambulance services due to the ongoing heatwave. While current temperatures are not expected to match the highs of a June heatwave, this period of heat may last longer, potentially extending into the following week.
In addition to England, Wales recorded its highest temperature of 31.3C in Cardiff, Scotland reached 29.3C in Charterhall, and Northern Ireland saw 27.5C in Killowen.
The amber alerts, issued for situations that could put the population at risk, were extended to north-west England and Yorkshire, joining existing alerts for the Midlands, eastern, and southern England. A yellow alert, indicating possible significant impact, is in place for the north-east.
The most extreme heat was observed in southeastern England, where some areas declared a heatwave on Monday after five consecutive days at or above 30C. This intense heat has also placed additional pressure on participants at Wimbledon. Tournament organizers have implemented measures such as providing extra water and electrolytes, along with iced towels and umbrellas during changeovers. Players may also request a 10-minute break between sets if temperature and humidity thresholds are met.
Thursday's high of 35.5C approached the record 35.7C recorded at the London tennis championships in 2015.