A contractor suffered serious burns Tuesday in a Cheverly warehouse that is being repaired in the wake of a collapse last summer that killed another worker.

An electrical arc caused second-degree burns to the contractor’s face, neck, arms and chest while he was making repairs in an underground vault, said Mark Brady, a Prince George’s County Fire/EMS spokesman. The contractor’s life is not in danger.

On June 28, a worker at the same warehouse, in the 1500 block of Cabin Branch Drive, accidentally ran a forklift into a filing cabinet, causing a domino-like collapse of shelves and support beams that in turn brought down the roof. One worker was trapped, and rescue crews searched for days in the sweltering heat before finding his body.  The warehouse was used by a document-management company known as Recall.

The contractor’s repairs were related to the June 28 accident, Brady said.