Train services across the United Kingdom are experiencing widespread disruptions as extreme heat raises concerns about the potential for rails to buckle and distort. Network Rail has imposed speed restrictions nationwide, particularly affecting routes with older rail infrastructure. These slower speeds aim to reduce stress on the tracks caused by the expanding metal in high temperatures. Passengers are facing significant delays and cancellations, especially during peak travel times. The heatwave, with temperatures expected to exceed 30°C in many areas, is the primary driver of these precautions. Network Rail is monitoring the situation closely and advises travelers to check their journey plans before traveling, as the disruptions are likely to continue as long as the heat persists.