It could be even hotter than yesterday.
The UK is set to see its hottest day on record, with temperatures on Tuesday expected to reach up to 42C .
Network Rail issued a "do not travel" warning for Tuesday, affecting services travelling through the "red zone" By 16:00, Lincoln, Cambridge and Huntingdon could see 40C - areas in the A1/M1 corridor may surpass this.Rail services on Monday evening were heavily impacted by the extreme heat, Network Rail said, with buckled rails reported and overhead wire systems failing. A new record rail temperature of 62C was recorded in Suffolk.
"The simple answer is no, the network cannot cope with the heat right now," he told BBC Breakfast. "In 40C heat, tracks can reach 50C, 60C, and even 70C, and there's a severe danger of tracks buckling and a terrible derailing.
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