A hazardous materials situation prompted the closure of all eastbound lanes on the 60 Freeway in Chino, snarling traffic in the area as the morning commute got underway.
Seven people were hospitalized following a chlorine spill at a pool supply business in Saugus, authorities said.
The derailed cars were carrying hot asphalt and molten sulfur, officials said.
A chemical exposure impacted a dozen people at a Houston tennis club on Saturday, according to the Houston Fire Department.
Taken together, the value of all residential real estate in the town adds up to about $380 million, including single family homes and multi-family properties. Those values are only a fraction of the money that Norfolk Southern earns.