Commuters have been warned to expect travel disruption as the UK’s extreme heat continues following the hottest day of the year.
Temperatures reached 30.1C (86F) in parts of the country on Monday, with forecasters predicting the mercury will rise even further in the next few days.
Speed restrictions are being introduced on some of Britain’s railways amid concerns that tracks will buckle in the sweltering conditions.
Divers recovered the man’s body from a lake in Nutfield, Surrey on Monday evening after reports he had been struggling in the water.
A major search operation is resuming for the missing child who got into difficulty in Westport Lake in Staffordshire.
The force said: Bodies of water may look safe, but can hide dangers such as hidden currents, hazardous objects, pollution and cold water shock, which affects our ability to swim and reach safety if experiencing difficulties.
The Met Office has issued a yellow health alert for heatwave conditions between Tuesday morning and Thursday evening.
Network Rail said it had activated its extreme weather action teams across Britain to monitor “vulnerable locations.
Speed restrictions will be introduced at certain times because slower trains exert lower forces on the track, reducing the likelihood of buckling, it added.
Andy Thomas, managing director of England and Wales at Network Rail, said: “On very sunny days, rails in direct sunshine can be as much as 20C (68F) above air temperature causing the steel to expand markedly and could, if not carefully monitored and action taken, buckle causing travel disruption.
South Western Railway said passengers travelling between London Waterloo and New Malden may face delays as speed restrictions are imposed from 11am each day until Friday.
Most of the country will enjoy warm weather between Tuesday and Thursday, with widespread temperatures expected to be above 25C (77F), the Met Office said.
They’ll be lots of sunshine over the next few days, Met Office forecaster Marco Petagna said.
The UK’s recorded its hottest day of the year so far on Monday as temperatures hit 30.1C in Hampton and Teddington, southwest London.