It's amid warnings of record UK temperatures.
East Midlands Trains are urging rail commuters not to travel on their services today.
It's due to the soaring temperatures expected across the country today, which could reach the high thirties.
High track temperatures means the risk of them buckling under pressure is much higher than normal.
#EMTUpdate We're strongly advising customers not to travel on Thursday 25 July. Journey planners have been updated, please check your journey before travellingTomorrow's timetable for the London route and further details are available here: https://t.co/QYqTYg4Ql4— East Midlands Trains (@EMTrains) July 24, 2019