HOBE SOUND, Fla. — Martin County Fire Rescue and the Martin County Sheriff's Office are investigating an explosion that happened on a sailboat Thursday morning.
The incident was reported at around 9:04 a.m. Deputies said a group on the sailboat were out cruising on the Intracoastal Waterway, near the 8000 block of Southeast Royal Street in Hobe Sound.
WATCH: Sheriff shares details about the boat explosion with WPTV
"The explosion was like a flash explosion, it was a pretty significant explosion," said Martin County Sheriff John Budensiek.
A total of six people were on the sailboat when the explosion occurred, the Martin County Sheriff's Office said.
According to initial reports, the explosion occurred when a person on board attempted to ignite a propane coffee maker.
"The compartment of the boat was completely sealed up, so there was no ventilation at all in that boat," said Budensiek. "Clearly there was a delay in time between turning on the gas and striking the ignitor."
The blast caused significant damage to the vessel, including "damage to the forward deck, blown out glass and fiberglass and the captain door blown off the hinges," Martin County Fire Rescue said.
Neighbors living near the intracoastal didn’t hear the boat explosion, but said they saw authorities responding to the scene.
"The street was lined with fire rescue, and sheriff’s, and FWC," said Janelle, who lives in the area. "I was just hoping that the people on board were okay."
A mother and her 15-month-old child were taken to St. Mary’s Medical Center. The mom was air-lifted to the hospital with serious burn injuries and the 15-month-old was taken by ground with non-life-threatening injuries, authorities said.
"In light of the significance of the explosion, we are thankful that there were no lost lives and not more damage," Budensiek said.
Florida Fish and Wildlife and State Fire Marshal’s Office are still investigating, but the cause is believed to be a vapor explosion.
"If you’re going to go out and use anything that’s gas related, make sure you know how to use it, make sure it’s properly ventilated and make sure you use it in the proper sequence," Budensiek said.
