LOS ANGELES — A fire that occurred around 6:30 pm Monday, Sept. 22 at the Port of Los Angeles was reportedly started by a welding torch, erupting a chemical-coated wharf into flames and forcing the closure of a nearby Catholic school.

According to the Los Angeles Fire Department, the warehouse fire burned through thick 18-by-12 inch pier timber covered in creosote, a wood preservative chemical, and will continue to smolder for several hours. The fire is “now under control,” officials say.

Fumes were not considered hazardous, but the local air quality is a concern for fire officials. The South Coast Air Quality Management District issued a smoke advisory for areas near the ports of Los Angeles and Long Beach, saying people with respiratory problems should remain indoors.

Schools in vicinity to the port area, including George De La Torre Jr. Elementary and San Pedro High School, were evacuated just before mid-day. Nearby private St. Peter and Paul Elementary School canceled classes altogether because of smoke concerns and shifting wind conditions.

More than 800 terminal employees were also evacuated, and two large ships and smaller cargo boats were moved away from the flames. The LAFD used helicopters, firefighting boats, and even a dive team to battle the flames, stretching across 40 acres of the pier. No injuries were reported.

Health officials said that air quality tests indicated elevated toxin levels not exceeding state or federal safety standards, but these will continue to be monitored until the fire is completely contained.

“At one point, there was fire the entire length of the wharf,” said LAFD Chief Ralph Terrazas.

(With reports from NBC News)