Check to see if any nearby catchbasin grates are obstructed by brush, leaves, snow or other debris and clear off the top of the grate to allow for proper draining.  Do not ever lift or open a public catchbasin.  If the problem persists you should contact the DPW Office at (508) 533-3275 so a technician can determine the cause of the issue, resolve it or recommend a solution.  If there has been no recent precipitation then the cause of sudden flood or buildup of water could be due to a water break which the Town should investigate.  Please note that the Town is not responsible for the maintenance of any private drainage systems and it is not permissible to discharge any substance into the Town's drainage system.