A coal-carrying cargo ship erupted in a fiery explosion in Baltimore’s Patapsco River on Monday evening, sending a large plume of black smoke into the air near the site of the 2024 Francis Scott Key Bridge collapse. Authorities confirmed that all 25 people on board the vessel were unharmed.
The incident occurred around 6:30 p.m. on August 18, 2025, aboard the M/V W-Sapphire, a 751-foot, Liberian-flagged bulk carrier. According to multiple reports, the vessel had just departed the CSX Curtis Bay coal terminal and was outbound for Mauritius when the blast occurred in the ship’s forward section. The U.S. Coast Guard confirmed there were 23 crew members and two pilots on board at the time.
Emergency crews responded swiftly to the scene. In a statement, the Baltimore City Fire Department (BCFD) confirmed that its fireboats, including the 87-foot John R. Frazier, located the W-Sapphire, which showed “signs of damage consistent with a fire and explosion.” The fire was contained, and the ship remained afloat. Tugboats assisted in moving the damaged vessel out of the main shipping channel to a designated anchorage area, where it will be held pending a full investigation led by the U.S. Coast Guard.
The Maryland Department of Emergency Management also confirmed it was monitoring the situation and reported no injuries or damage to other property. The Coast Guard established a safety zone around the vessel, with reports varying between a 500-yard and a 2,000-yard perimeter, to secure the area.
Eyewitnesses sailing nearby described a dramatic scene. Jay Steinmetz and his son, Sam, were on a sailboat when they heard a “really loud explosion,” he told CBS Baltimore. “We turned around, and there was a 200-foot plume of smoke.” Steinmetz said that within minutes, they heard a “Mayday, mayday” call over their radio. They initially thought the noise was related to the ongoing demolition of the remaining sections of the Key Bridge.
The explosion has renewed maritime safety concerns in a city still recovering from the catastrophic collapse of the Francis Scott Key Bridge on March 26, 2024. In that incident, the container ship Dali lost power and struck a support pier, killing six construction workers and shutting down the port for months. Demolition of the remaining bridge sections is currently underway, with a new, more resilient cable-stayed bridge expected to be completed by 2028.
While the official cause of the W-Sapphire explosion is under investigation, maritime experts point to the inherent dangers of its cargo. According to a report by gCaptain, coal has a long history as one of the most hazardous bulk cargoes due to risks of spontaneous combustion, methane gas emissions, and coal dust ignition. The publication noted that the UK P&I Club, a leading ship insurer, had previously issued warnings about dangerously high methane levels in coal shipments from the U.S. East Coast. The incident also highlights ongoing debates about port safety protocols, as Baltimore still lacks a Vessel Traffic Service (VTS) system, which functions like air traffic control for ships, more than a year after the Dali disaster.
As federal and local agencies begin their investigation, the W-Sapphire remains anchored while authorities work to determine the sequence of events that led to the dramatic explosion.
