The 海角视频 heatwave could lead to reduced train services across the South of England and Wales after midday today (Thursday, July 25), Great Western Railway (GWR) is warning.
Temperatures are expected to reach record-breaking levels in parts of the country and GWR is urging people to check before they travel.
Network Rail is predicting track temperatures of more than 50 degrees Celsius and says heat-related speed restrictions on lines are likely to be required.
GWR expects to reduce the number of long-distance services as a result and journeys are likely to take longer.
GWR managing director Mark Hopwood says the extent of the restrictions can only be determined by "conditions on the ground" and are likely to change throughout the day.
He said: “We will continue to run as many trains as we can but those travelling should be aware that we will have to reduce the number of trains we can run, journey times will take longer and those trains we can run will be much busier."
GWR says that those who have a ticket for Thursday but would prefer to travel on Friday instead will be able to use their tickets.
Mr Hopwood added: "The priority will be to keep trains running and customers moving safely, but changes to services are likely to be needed to allow that to happen."
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Morning services are currently expected to run as normal, but as temperatures rise throughout the early part of the day GWR may have to reduced half-hourly train services to hourly on certain routes. Trains that are able to run are expected to be busy.
Network Rail’s route director Mike Gallop said: “Keeping passengers moving safely and as quickly as possible is our priority as we tackle the impact of the extreme temperatures on the railway.
“We are doing all we can to minimise the number of speed restrictions necessary and reduce delays."
“We advise passengers to check before they travel and to stay hydrated with free water fountains available at Bristol Temple Meads, Reading and London Paddington.”
If your train is cancelled you are able to board the next available service and you may be entitled to delay repay compensation if you are delayed by 15 minutes or more.
Those who choose not to travel will be able to claim a refund on the single part of their ticket. They will need to keep the ticket and visit GWR.com/DelayRepay.