Tropical Storm Olga (2007)
Heavy rainfall fell across the Dominican Republic, with isolated totals of 10 inches (250 mm) expected. The rainfall caused flooding along the River Yaque del Norte, and at first there appeared to be a threat that the Tavera Dam along the river would fail, potentially killing thousands in Santiago Province. Officials instead chose to open all six floodgates at 0400 UTC on December 12, which released about 1.6 million gallons (6.1 million liters) of water into the river every second. It formed a 66 foot (20 m) wave of water is a result that caught many off guard due to the time of night and only about 15 minutes to prepare, according to eyewitnesses who criticized the decision; the flooding killed at least 20 people and left homes seven towns flooded. Two other deaths were reported elsewhere in the country, and more than 34,000 people fled their homes due to the storm; more than 7,500 houses were damaged. In neighboring Haiti, two deaths were reported in the northern portion of the country.