Katherine Heigl -- Firefighters Rush to L.A. Home Over Steamy Affair

A fire truck rushed to the home of Katherine Heigl moments ago -- but TMZ has learned ... it was a steamy false alarm.

A rep for L.A. City Fire tells TMZ, a call was placed at 1:36pm reporting a possible fire -- and firefighters scrambled to the scene.

But Katherine's rep tells TMZ, the alarm was triggered by some steam inside the house -- the source is unclear. No one was hurt.

It's also unclear if Katherine was home at the time -- but her husband Josh Kelley (above) greeted firefighters at the gate ... before sending them on their way.

Source: http://www.tmz.com/2012/03/29/katherine-heigl-fire/

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