A cold front will move across the Northeast today and will settle south into the Mid-Atlantic Tuesday and Wednesday. That front will put an end to the heat across the Northeast and Mid-Atlantic states but not for the Carolina’s where the heat will continue.
Severe storms will run out head of the front this afternoon and tonight and while this will not be a widespread severe weather event, some areas will see damaging wind gusts and hail. I don’t think this is a tornado situation because the shear is just not there for supercell storms. Typically when you break a heatwave, the storms produce strong wind gusts.
The simulated radars area showing several waves of storms from Ontario to New England. So it’s not out of the question that some areas have several rounds of storms through tonight.