About 500 Maryland City residents were briefly told to stay indoors with their air conditioning off after sulfuric acid was discovered leaking from a trailer that was delivering the chemical.
More than 30 children are being evaluated for possible chemical exposure at a camp pool in Anne Arundel County on Wednesday morning.
A man was caught trespassing Sunday afternoon in a garage in Alexandria, which is closed on weekends.
A Food and Drug Administration building in Silver Spring has been evacuated after high levels of carbon monoxide were detected.
Hazmat crews were called to investigate whether a middle school student exposed others to mercury by bringing the substance onto a school bus and into a Montgomery County classroom Wednesday morning.
A fuel tanker overturned early Friday morning in Prince William County, sparking concerns about a possible gas explosion, officials said.
The southbound lanes of Interstate 95 have reopened following a lengthy cleanup of a crash involving hazardous materials in Stafford County.
As many as three people have fallen ill as a result of a possible chemical odor inside an office building in Rockville, fire officials say.
A HAZMAT team had to contain a Freon leak at local hospital in Bethesda on Tuesday.
Students at St. John’s High School in Northwest D.C. are being evaluated by hazmat crews.