For the second straight day, in much a similar way, a bathroom was burned by an arsonist in Juneau.

Shortly after 3 a.m. Wednesday morning, the Juneau fire department was brought to Bartlett Regional Hospital by a 911 caller reporting fire and an explosion.

“Someone had set something on fire in the bathroom in the waiting room lobby adjacent to the emergency room,” said Capital City Fire/Rescue Assistant Fire Chief Ed Quinto.

The fire came less than 24 hours after an as-yet-unidentified arsonist set a fire in a Thunder Mountain High School bathroom.

Katie Bausler, a spokeswoman for the hospital, said a man identified as Arlo Bradstreet set a small fire in a bathroom trash can. The fire melted the trash can and was sufficiently hot to trigger the bathroom’s sprinkler system.

According to court records online, Bradstreet has been charged with second-degree arson, a class B felony. He is scheduled to be arraigned on those charges at 1:15 p.m. today at Dimond Courthouse.

Two patients and 15 staff were working in the hospital’s emergency department at the time: All were exposed to smoke, but none sought medical attention, Bausler said.

Quinto said a triage nurse in the emergency department reported hearing a loud boom and feeling the room shake as the fire took place. It is yet not clear what, if anything, exploded during the fire.

Bausler said the noise and shaking may have been caused by the sheer force of the sprinkler system starting.

“The sprinklers really did their job,” Bausler said, adding that an inch of water covered the floor of the emergency department’s waiting room before cleanup began.

When the Empire visited the hospital Wednesday morning, there was little sign of damage and more sign — literally — of cleanup. “Wet floor” signs were scattered around the waiting room near floor fans attempting to dry the scene.