The National Weather Service in Boston/Norton, MA has issued a Flood Warning for the following rivers in Massachusetts... Assabet River At Maynard affecting Middlesex and Worcester Counties Runoff from the heavy rains on Monday continues to cause the water level on the Assabet River at Maynard to slowly rise this afternoon. The level is expected to reach flood stage Wednesday morning. The National Weather Service in Boston/Norton, MA has issued a * Flood Warning for The Assabet River At Maynard. * from Wednesday morning to Wednesday evening...or until the warning is cancelled. * At 11:15 AM Tuesday the stage was 4.5 feet. * Flood stage is 5.0 feet. * Minor flooding is forecast. * Forecast...The river is expected to rise to near flood stage tomorrow morning. * Impact...At 5.0 feet...Minor lowland and backyard flooding is likely along reaches of the river in Maynard, Concord as well as Hudson. Several river roads may also become covered in water.