As a polar vortex is set to engulf Texas, residents are urged to prepare for the coldest temperatures of the season, plunging below freezing starting Sunday. Areas including North Texas, Houston, Austin, and San Antonio will experience a significant drop in temperatures following a warm weekend. Weather alerts warn of a potential hard freeze and the possibility of snow, prompting local officials to advise residents on how to protect their homes, pets, and plumbing. Various parts of Texas are bracing for severe weather conditions, with expectations of wintry precipitation and frigid air bringing potential disruptions. The influx of arctic air is anticipated to challenge the Texas power grid and could lead to engagement on severe weather updates. Texans are encouraged to stay informed and ready as this weather pattern unfolds.