Texas Enabled the Worst Carbon Monoxide Poisoning Catastrophe in Recent U.S. History They used their car to stay warm when a winter storm brought down the Texas power grid. In a state that doesn't require carbon monoxide alarms in homes, they had no warning they were poisoning themselves. Leland Foster for ProPublica/The Texas Tribune/NBC They used their car to stay warm when a winter storm brought down the Texas power grid. In a state that doesn't require carbon monoxide alarms in homes, they had no warning they were poisoning themselves. Leland Foster for ProPublica/The Texas Tribune/NBC