LONDON (AP) – Britain’s record-breaking heat wave has disrupted travel for a third day and firefighters remain on alert even as cloudy skies and showers have brought relief from the scorching temperatures of recent days. Forecasters predict London will reach a high of 26 Celsius (79 Fahrenheit) on Wednesday, down from the record 40.2C (104.4F) set Tuesday at Heathrow Airport. Still, the main train line from London to Edinburgh will remain closed until noon as crews work to repair power lines and signaling equipment damaged by a heat-related fire on Tuesday, according to the London North Eastern Railway.