McHenry County, Illinois, is preparing for significant flooding as the Fox River rises, expected to crest at over 12 feet at the Algonquin tailwater. The Stratton Lock and Dam has already reached major flood levels, prompting local officials to distribute thousands of sandbags to protect homes and roads. Over 100 volunteers are assisting in sandbagging efforts, reminiscent of past floods in 2013 and 2017.