A firefighter suffered a medical emergency while driving a firetruck according to a preliminary crash investigation. The firetruck struck five other vehicles before rolling onto its side and coming to a stop. According to the Texas Department of Public Safety, the Lake Travis Fire and Rescue firetruck was traveling southbound on FM 620 on Wednesday, May 16, 2018 when the driver had a medical emergency and lost consciousness. The firetruck drove into the northbound lanes and oncoming traffic. Two other vehicle struck debris that flew from the firetruck following the crash. The firetruck came to a rest on its right side in the northbound bar ditch.