Park Regency Apartments in Walnut Creek.
MAGE 1 OF 2 The effects of an explosion at the Park Regency Apartments in Walnut Creek. Photo by Gina Gayle/The SF Chronicle. Image 2 of 2 James MacMillan, a general contractor with Paul Davis Restoration, goes over the damage from an explosion at the Park Regency Apartments in Walnut Creek. Photo by Gina Gayle/The SF Chronicle. A natural gas explosion ripped through a section of a Walnut Creek apartment complex yesterday afternoon, but nobody was seriously hurt or killed. The second-floor unit where the blast occurred was vacant and most neighbors -- perhaps because of the nice weather -- were out of the Park Regency Apartments when the explosion happened at 12:15 p.m. "It sounded like an airplane hit it," said Beverly Batton, who was in a first-floor garage at the time of the blast, having just returned from the grocery store. A Contra Costa Fire Department dispatcher said a man and woman, both 29, were taken from the scene to John Muir Medical Center. They were treated for abrasions to their face and extremities and released.