Some residents in the southwestern section of Hoboken woke up to find they have no water, or little water pressure after two mains ruptured a couple blocks apart, the water company reporter. Suez crews are conducting emergency repairs on a 12-inch water main on Madison Street between First and Third streets, and a 16-inch main on Second Street between Monroe and Jefferson streets. Suez officials said residents and businesses in that vicinity may experience a loss in water pressure and/or service while work is under way. On Wednesday, a 6-inch water main at First and Jefferson streets broke whi…