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The soaring temperatures on the London Tube over the summer season months have been a issue for some years now. A London Underground team has attempted to come up with some engineering options to the problem by producing a groundwater cooling method. The trial, which starts this summer season, aims to make it cooler for passengers on platforms and will be tested at Victoria station which is so deep that it is properly below water and pumps out 35 litres (eight gallons) a second, to quit it coming via the walls. The notion of the new program is to push the water by means of a network of pipes into heat exchange units on the platforms, which will suck in warm air and pump out cooler air. The heat could be used to power properties and offices above and this way the temperature will be brought down. But this is only a trial to be tested this year and it is far from becoming place into perform as well as new trains with air cooling systems that are promised for Circle, District, Hammersmith and City and Metropolitan lines. Meanwhile the temperatures in the deepest tunnels, reach 30C (86F) in summer season. These adjustments may affect the London Tube in a drastic way. Some of the Tube lines could be closed particularly on the hot summer time days. London Underground assures that there are no plans to close any Tube Lines during the summer season but in the future years it might get to the point "where the underground will turn out to be literally intolerable and you could face the prospect of loss of life" as Mr Livingstone from LU advised. seo london found it About 1,000 London Tube passengers had been trapped for practically two hours when 3 trains were held up in a tunnel. The Central Line closed following signal failures stopped the trains between Marble Arch and Lancaster Gate. The trains have been evacuated and 3 individuals were treated for the effects of heat.