A travel trailer used as a permanent home in Morongo Valley was destroyed in an early-morning fire Monday. Morongo Valley Fire Engineer Murphy said a passer-by driving by on the highway called in the fire in the 9100 block of Bella Vista at 1:47 a.m. Monday morning. Fire fighters from Morongo Valley, Yucca Valley, and CalFire arrived to find the travel trailer fully involved in flames. The resident was not home at the time of the blaze. The cause of the fire is under investigation.