Updated 7:15 p.m. According to the Twitter feed for the Waltham Police, Bear Hill Road has re-opened to two lanes and traffic is flowing normally.
A water main has burst in the area of Bear Hill Road near , according to Twitter and police scanner reports.
The road is apparently buckling as police scramble to close down the road, according to reports. Traffic delays are expected. Avoid the area. Officials are working to reach the city's water department.