Flash flood warning issued as storms bear down on NYC and Long Island

Key Points:

• Over 60 million people from Ohio to Massachusetts and Virginia are facing potential flash flooding on Monday following a deadly heat wave that brought triple-digit temperatures to much of the East Coast.
• New York City and Long Island are at the highest risk with a level 3 out of 4 threat for flash flooding, and up to 8 inches of rain could fall in some Northeast areas, prompting flood watches and flash flood warnings.
• Severe weather caused a partial roof collapse at a BJ's Wholesale Club in Ocean Township, New Jersey, but no injuries were reported; meanwhile, more than 700 flights have been canceled at New York and New Jersey airports due to thunderstorms.
• New York City officials urged residents, especially those in basement apartments, to prepare for flooding and evacuate if necessary, while city workers cleared catch basins and prepared flood-prone neighborhoods.
• The storms follow a multi-day heat wave that led to widespread power outages affecting hundreds of thousands across several states, with at least 25 heat-related deaths reported in New Jersey alone.