Pictures from the site of the leak on Cranes Farm Road show a large quantity of water springing from the ground off the roundabout and pouring down into the underpass. Heat - High temperatures can cause water mains to burst (Image: Newsquest)No repair teams are currently visible at the site of the leak. Underground water pipes can often shift during hot weather conditions, causing them to crack and burst. The UK is facing its fifth heatwave of the year, with rare amber “extreme heat” warnings issued by the Met Office for parts of Essex today. Essex and Suffolk Water have been contacted for comment.