Venice, a city usually concerned with devastating floods, now faces the opposite problem: canals are starting to run dry following weeks of dry winter weather and unusually low tides. A combination of factors is believed to have caused this rare sight: lack of rain, high atmospheric pressure, and the lunar cycle producing low water levels during ebb tide. Since the canals serve as streets in the city, the phenomenon has implications beyond the disappointment of the tourists. Some of Venice’s smaller calas have dried up almost entirely, making it impossible for gondolas, water taxis, and ambulances to reach areas of the city.