A significant fire broke out at an electrical substation, leading to a power outage and the subsequent closure of Heathrow Airport until midnight on March 21. The incident disrupted flights and impacted over 16,300 residences in west London, forcing the evacuation of around 150 individuals. To combat the blaze, emergency services mobilized 70 firefighters. Officials are currently conducting an investigation to determine the cause of the fire and are cautioning the public about potential ongoing disturbances in the area.