The Hammersmith Bridge has been coated in large pieces of foil to prevent it from scorching as temperatures rise.
With temperatures in London forecast to reach 35C (95F) next week, silver insulation foil has been laid over the structure to shield it from the sun and keep the bridge open.
A £420,000 temperature control system is also switched on at night.
The bridge, currently only accessible to pedestrians and cyclists, was also closed in 2020 due to a heatwave.
An amber alert has been issued by the Met Office from Sunday until Tuesday, with extreme heat expected in the capital.
