Despite Monday's reassurances from race officials, Hurricane Sandy might interrupt Sunday's New York City Marathon, as crippled public transportation, flooded streets, and power outages persist. On Monday, New York Road Runners President Mary Wittenberg said they were prepared for the worst. “We have time on our side," she said. “We've been through close to it all.” The course largely skirts the high-risk storm areas, but major flooding has made it uncertain whether there will be a transportation system to carry the nearly 50,000 amateur runners scheduled to compete. The marathon brings an estimated $350 million to the city every year.