London transport in chaos as extreme heat causes severe delays

Milo Pope | Live News reporter Published August 13, 2026 5:13pm Updated August 13, 2026 5:13pm Londoners are facing travel chaos after an extreme heat warning (Picture: Getty Images) Commuters are facing severe disruption across the London Underground after an extreme heat warning was put in place. Transport for London has issued delay warnings to 12 different lines as rush-hour commuters face chaos travelling home. Earlier today, a train derailed in East Sussex, forcing the closure of several rail lines. Police, fire crews and ambulances were called to the scene near Lewes rail station just after 3.30pm. Major delays are now expected until 10pm, according to National Rail. This comes after commuters were told ‘not to travel’ after forecasts of 38°C temperatures. Rush hour commuters could