A series of tornado watches and severe storm alerts have been issued for large parts of the Northeast and Mid-Atlantic, affecting over 116 million residents. Regions such as New York, Philadelphia, and New Jersey are under threat from severe thunderstorms, tornadoes, and flash flooding. The National Weather Service has placed watches in effect for major cities including all five boroughs of New York City, while parts of Central and Upstate New York remain on alert until Tuesday night. As heavy rains and strong winds are anticipated to trigger flooding, precautions are being recommended. With over 1,000 flights canceled due to the storm-related disruptions, authorities are urging communities to prepare for potential destructive weather conditions.