UPDATE: The City says Dundas will remain closed in the area until noon Friday. City crews are working to fix a watermain break in Woodstock today. A main broke somewhere beneath Dundas St., near Mill St. As a result, Dundas is going to be closed to traffic between Mill St. and Van. Ave. As well, northbound traffic on Mill St. may be affected. There's no word on what caused the break, but the sudden overnight freeze after two days of mild and damp weather may have been a key factor.