Network Rail has installed a ‘Summer Rail Garden’ at the National Railway Museum in York to show how increasingly hot and dry weather is affecting Britain’s railway network. In June, temperatures were so high that they broke records, and more hot and dry conditions is expected in August. Hot weather impacts on the rail network in several ways, including:Buckled rails . Very high temperatures may cause signalling and other electrical systems to overheat, which may cause faults to develop. Very high temperatures may cause signalling and other electrical systems to overheat, which may cause faults to develop.