KXAN reports that the crash occurred shortly after 8:00 am just a few miles south of Schulenburg.
A 2015 Lexus SUV was headed southbound on U.S. 77 when it lost control on the wet roadway and veered into oncoming traffic. It collided head-on with a 2014 Nissan pickup.
Both occupants of the Nissan were pronounced dead at the scene. They have been identified as Roger Cheney, 67, and Cynthia Cheney, 64. The passenger of the Lexus, a 15-year-old boy, was also killed in the collision.
The driver of the Lexus, Denise Cain, 52, sustained critical injuries and was transported to University Center Backenridge in Austin.
DPS is still investigating the accident but did say all occupants were wearing seatbelts. They are reminding motorists to slow down for inclement weather.
The following information was provided by the Texas Department of Transportation (TxDOT):