Motorists are being warned of difficult driving conditions as a thunderstorm brews due to sweltering conditions.
The Met Office has issued a weather warning for thunderstorms covering Preston and Lancashire.
Temperatures are expected to peak at 29 degrees during Tuesday (23 July) afternoon in the city.
A yellow weather warning, the lowest level, is in force from 6pm on Tuesday until 9am on Wednesday (24 July).
A spokesman said: “Scattered thunderstorms moving north tonight and early Wednesday could lead to some power cuts and travel delays.
“There is a slight chance that power cuts could occur and other services to some homes and businesses could be lost.
“There is a small chance of damage to property from lightning strikes, hail or strong winds
“There is a small chance of a few homes and businesses likely, leading to some damage to buildings or structures.
“There is a small chance driving conditions will be affected by spray, standing water and/or hail, leading to longer journey times by car and bus.”
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