Trains were delayed today because tracks were too hot in the March sunshine.
The commuter route on the Welsh coast reported "high rail temperatures" on the lines - and trains were ordered to slow down.
Network Rail reported that "track monitoring equipment" has indicated high rail temperatures between Talacre and Mostyn in north Wales .
This means an emergency speed limit of 20mph has been imposed by Network Rail for approximately one mile between Prestatyn and Flint.
According to the Met Office, the temperature at Talacre hit 14 degrees.
Trains were delayed for up to 20 minutes but commuters advised it would get back to normal when the sun dropped.