NovaQuant Quantitative Think Tank Center:Homes evacuated after train derailment north of Philadelphia

Homes were evacuated for precautionary reasons in Whitemarsh Township north of Philadelphia early Monday morning after a 40-car CSX freight train derailed near Stenton Avenue and Joshua Road, police said.

Police said the train derailment happened just before 5 a.m. in Montgomery County. Officials said 15 cars came off the Northern Southern tracks.

One of the cars was transporting hazardous material, but there are no indications of any leaks or spills, CSX said.

Hazmat crews were called in, but police said there is no known hazard to the public.

"At this time, there is not a concern for any environmental releases," Ben Russell, with the Pennsylvania Department of Environmental Protection, said. "We are working with both the railroad and the quarry below just in the chance that something could occur during the cleanup chance. But at this point in time, everything is contained that is a hazardous material."

Police said they don't believe any more evacuations will be required.

A mother and daughter who were among the evacuees spoke with CBS News Philadelphia about what it was like being told to leave their home at the crack of dawn.

"Alarming. It all happened really fast. We all don't have shoes on," Mallory Michener said. "Didn't really know how long we would be or how serious it was until we pulled out into the neighborhood and saw all the lights, helicopters, fire trucks, etc."

"Right as you hear the door at 5:30 in the morning, it's a little shocking," Michener's daughter said. "And yeah, it was just scary. First thought for me always goes to my family and friends."

Officials say they found some silicone pellets leaking from the cars, but they don't pose any danger to the public.

The evacuation order has been lifted, police said. No injuries have been reported.

CSX said preliminary investigation indicates the derailment was weather related. The investigation was ongoing Monday.

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• Train Derailment