Crews from a half-dozen Bexar County fire departments responded to a fast-moving fire.

Flames destroyed a mobile home in the 22000 block of Fawn Trail in southeast Bexar County near Elmendorf early Monday morning.

The first fire crews were on scene around 3 a.m. About 20 firefighters from six different departments responded and fought the fire defensively because it was fully engulfed in flames.

The mobile home was not searchable when crews arrived, but neighbors did not believe anyone was inside the home, fire officials said.

A neighbor said he was relieved to see fire trucks when he looked outside, because he has worried about whether firefighters could quickly respond to a fire in the area.

"There's no fire department around here, but it was pretty awesome that they responded pretty quick. By the time I knew it, there were four or five fire trucks out here," said Mingo Garcia, who lives next to the mobile home. "You never know when a situation like this is going to come up."

Water supply was an issue for fire crews. They ran 1,000 feet of hose to get water to the home, and brought in several tanker trucks.

A shift commander said current code for new developments requires fire hydrants every 300 feet. However, the area does not fall under current code.

The shift commander said he would follow up with neighbors and San Antonio Water System to see what it would take to get more fire hydrants in the area.

The cause of the fire was under investigation Monday morning by the Bexar County Fire Marshal's Office.

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Fawn Trail fire 2

Fawn Trail fire map