Supermarkets, including M&S, have struggled during the back-to-back heatwaves that are pushing infrastructure to the limit (Picture: Myles Goode) Another heatwave is gripping the UK after the June sizzler, putting pressure on infrastructure from water supplies to supermarkets. Temperatures in the UK cranked up to over 37C during the recent heat dome blanketing western Europe. It forced several hospitals to declare critical incidents, while experts warned that extreme heat is becoming the new norm as climate change ramps up. Major supermarkets also felt the brunt of the heat, with shoppers facing empty fridges after cooling systems struggled to cope. Some fridges at the M&S on Kensington High Street in west London had been switched off today to help the other units stay cooler, the note sai