On September 21, 1938, following several days of heavy rain, the New England Hurricane of 1938 passed through the center of New England. The additional rains from the storm caused the Deering Reservoir dam to breach, releasing a wall of water that rushed down to the Weare Reservoir dam. Although the dam held, the flash flood broke through the land at the side of the dam, releasing millions of gallons of reservoir water. The raging river, completely out of control, washed away everything in its path, leaving parts of Weare devastated. Many active mills were destroyed in the disaster.