(CNN) - As residents in the lower Mississippi Valley fret over the possibility of another hurricane, a separate storm system is drenching the Northeast and has killed two people.
High waters swept away a car in Pennsylvania, killing a pregnant woman and her 8-year-old son, Douglass Township Police Chief John Dzurek told CNN affiliate WFMZ. The two were swept down the Manatawny Creek for about half a mile.
"They were not able to get out and water was starting to come into the vehicles," he said.
The woman in the car was on the phone with 911 operators until fire rescue arrived and then she remained in contact with rescuers for about 30 to 45 minutes, as they tried to reach her car in the rising water, according to the chief.
Authorities made multiple attempts to call the woman back, but the call went to voicemail.
The car was found around 9:45 p.m. down a steep embankment -- a little over five hours after crews were dispatched to the area.
In surrounding areas, rescue crews received multiple calls about vehicles stuck in the high waters, the affiliate reported.
Flash flood warnings across the Northeast
The line of storms that marched through Ohio, West Virginia and drenched Pennsylvania will continue into the Northeast Friday morning, CNN Meteorologist Robert Shackelford said.
The storms unleashed rain over Maine and New Hampshire late Thursday, in some cases up to an inch and a half, the National Weather Service said.
Showers and thunderstorms will pour over the region throughout the night and flash flooding is likely, according to the service.
"Given the anomalous pool of moisture over the region and the intense rainfall rates, some pockets of flash flooding will be possible," the service said.