The heat advisory includes parts of Delaware, Pennsylvania, New York, Connecticut and New Jersey, where two people died in flooding.

New Jersey remains under a state of emergency after heavy rains brought flash flooding to a number of towns including Plainfield where two people were killed in the flooding.

After the July 14 storm flooded areas of New Jersey, the National Weather Service issued an alert for more extreme weather ahead.

At 9:20 a.m. on Wednesday, the National Weather Service reported an air quality alert in effect until 11 p.m. for Passaic, Hudson, Bergen, Essex and Union counties.

NYC could be in play for another heat wave this week, with the potential for more heavy rain, storms and flash flooding due to the hot and humid conditions.