Firefighters in Philadelphia battled a massive fire overnight after a large explosion at a 150-year-old refinery in South Philadelphia. This marked the second time this month emergency responders were called to the Philadelphia Energy Solutions Refining Complex, which produces 335,000 barrels of crude oil every day. It’s said to be the largest such complex on the U.S. Eastern Seaboard. No injuries were reported, but nearby neighborhoods were ordered to shelter in place.