Urgent Warning: Heat Stress Intensifies as UK Swelters — These Are the Symptoms

Extreme heat and unusually high humidity are placing growing strain on people across the UK. Red heat-health alerts cover six English regions until 11pm on June 26, while every other region remains under an amber alert.

Heat stress develops when the body cannot release heat quickly enough to maintain a safe internal temperature. It can begin with exhaustion and dehydration before progressing to life-threatening heatstroke, making early symptoms essential to recognise.