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The Independent UK
The Independent UK
Natalie Wilson

UNBELIEVABLE: Why do trains get cancelled in a heatwave - The Untold Story

Rails have been recorded at temperatures as high as 51C - (Getty/iStock)

“Buckling” occurs when steel rails expand as they get hotter and can start to curve.

Thousands of miles of steel track make up the UK’s rail network, absorbing heat up to 20C hotter than the air temperature, said Network Rail.

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