Explain the harmful reasons of snowstorm in Texas from the perspective of frontogenesis and frontogenesis.

Natural reasons: This is related to the topographical features and climate of North America. Because the terrain of the United States is low in the middle and high on both sides, this leads to a cold current from the Arctic Circle in winter, which can go straight down to the Gulf of Mexico. Texas is located in the path of the polar cold current southward, which is prone to snowstorms.

Humanistic reasons: the infrastructure and emergency measures for dealing with extreme weather such as snowstorms in the United States are not in place. As the states in the United States are fragmented, in the event of a snowstorm, Hainan, Texas, received rapid support from other parties, which virtually expanded the harm of the snowstorm.