Several homes in the Valley of the Sun Mobile Home Park were evacuated Thursday night while Northwest Fire hazmat crews and an Arizona Department of Public Safety bomb squad investigated the scene of an explosion.

A 30-year-old man is in critical condition at the Arizona Burn Center in Phoenix after he was burned in an explosion in a Marana mobile home park, authorities said.

Shortly before 10 p.m., paramedics responded to Valley of the Sun Mobile Home Park, 13377 N. Sandario Road, to a report of an unknown explosion that burned a man, said Capt. Adam Goldberg of the Northwest Fire District.

The man was flown by medical helicopter to the burn center at Maricopa Medical Center, where he is being treated for life-threatening burns, Goldberg said.

The explosion was confined to a large shed alongside a mobile home, and crews found no sign of active fire when they arrived at the scene, within minutes of receiving the call from dispatch.

Six nearby mobile homes were evacuated, andΒ Sandario between West Greer to Gaudette roads was temporarily closed, Goldberg said.

Hazmat crews with Northwest Fire District and Arizona Department of Public Safety bomb squad members spent several hours in the shed and surrounding areas before clearing the area as safe from additional explosions at about 3 a.m.

The man was the only one injured, but his mother, father and girlfriend were inside the home at the time of the explosion, Goldberg said.

The cause of the explosion is currently unknown. Marana Police are investigating the incident.


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Contact reporter Caitlin Schmidt at cschmidt@tucson.com or 573-4191. On Twitter: @caitlincschmidt