A mass tort is a civil action involving numerous plaintiffs against one or a few corporate defendants. The tort may involve, for example, personal injuries suffered by numerous plaintiffs as a result of a defective product, or a mass disaster in which there were many injured persons, such as an airplane crash, or exposure of a large group of people to toxic chemicals or pharmaceuticals.
Natrona Heights is an unincorporated community in Harrison Township, Allegheny County, Pennsylvania, United States; it is located in Western Pennsylvania within the Pittsburgh Metropolitan Statistical Area, approximately 24 miles (39 km) northeast of Pittsburgh. Natrona Heights is situated near the Allegheny River, Natrona, Brackenridge, and Tarentum. The elevation of Natrona Heights is 994 feet above sea level. The postal ZIP code is 15065, while the telephone area codes are 724 and 878; although, the code 878 is not used.