Investigators say a can of insect spray that fell from a store shelf sparked a hazmat situation inside a Walmart in Gloucester County, New Jersey.
Six people were taken to the hospital after a chemical leak in Philadelphia's Bridesburg neighborhood.
A shelter-in-place was issued, but has since been lifted.
Ten people were treated after a possible hazmat incident inside a poultry processing plant in Southwest Baltimore Sunday, according to the fire department.
Video from Chopper 6 shows the roof partially collapsed at Seabrook Brothers & Sons Inc.
The precautionary shelter-in-place in Deptford Township, Gloucester County, has been lifted as of 1:40 p.m. after a hazmat situation on Thursday.