As rain and cold mixed Thursday night, the city of Austin says 423 people chose to utilize the city’s overnight cold weather shelters.

The cold weather rolling in Tuesday night means homeless shelters are scrambling to make room for an influx of people looking to stay warm. The front also arrives at the same time that a new state law goes into full effect.

The City of Houston is directing people to overflow shelters as temperatures plummet into the thirties amid rainfall, creating potentially life-threatening conditions for the homeless population. Local officials warn that the combination of cold and wet weather poses a severe risk of hypothermia for those exposed to the elements.