HOUSTON -- Two homes were destroyed after an explosion at a state Supreme Court justice's home late Thursday, KPRC Local 2 reported.

The 3-alarm blaze broke out on Highfalls Drive near Dawn Meadow Drive at about 10 p.m.

Residents said they called 911 after they heard an explosion in Justice David Medina's detached garage. Medina's wife and son were the only ones in the family's residence and both escaped unharmed, officials said.

"My grandson ran through the house and he saw the garage on fire," neighbor Judy Livingston said. "He says, 'Grandma, call 911!' It happened with seconds of the boom."

Many residents said no one answered when they called 911 for help.

"No answer," Livingston said. "No answer whatsoever. When I came out, several people on the street said they also called 911 and none of us got any responses."

Medina's wife also tried to call 911 before escaping from the home with her son, but did not get through.

Klein Volunteer Fire Department officials said many of the calls might have gone unanswered because the system was likely overloaded.

"The first truck was here within eight minutes of the initial call," Jim Young said. "They (the houses) were both fully involved when we got here."

The fire spread from Medina's home to the house next door, destroying it.

Everyone inside both homes got out without injury.

Medina's son, Vincent, found their pet rabbit, Bugs, hiding in bushes outside the home and located their two dogs on Friday morning.

Three firefighters were treated for heat exhaustion. One was transported to a nearby hospital as a precaution.

The fire heavily damaged the Medina house and a neighboring home, destroyed the Medinas' 3-car garage and one vehicle in the driveway. It also caused slight damage to another residence.

The cause of the blaze was not immediately known, although officials said the fire is not thought to be suspicious.

Supreme Court spokesman Osler McCarthy said Medina commutes to Austin, where the high court is based, and arrived back in Houston after the fire had been put out Thursday night.