London Transit Agency Advises Passengers to Carry Water as Temperatures Rise

Transport for London advised passengers using its services over the bank holiday weekend to carry water as temperatures are forecast to exceed 30C (86F). " The UK Health Security Agency issued its first amber heat-health alert of 2026 for London on Friday, warning that high temperatures over the coming days may put vulnerable people at increased risk.

London is expected to record its hottest May day on record on Monday, with temperatures predicted to reach 34C before falling to 24C on Wednesday. TfL stated that air-conditioned trains operate on 40 percent of the Tube network and that all London Overground and Elizabeth line services are air-conditioned.

On older sections of the Tube with fewer ventilation shafts, the agency has installed industrial fans and other cooling systems. Every TfL bus has reflective roofs, insulation and opening windows, and all new double-decker buses include air cooling.

The UK Health Security Agency recommends keeping homes cool by closing windows and curtains on sun-facing rooms, wearing hats and sunglasses outdoors, seeking shade, and applying sunscreen. It also advises staying out of direct sun between 11:00 and 15:00 and knowing the symptoms of heat exhaustion and heatstroke.

TfL said it will monitor track temperatures, respond quickly to air-conditioning faults, and conduct regular checks on moving parts of tracks and crossings during the heatwave.