The last time the nation shivered though such a cold February was 1989. In Texas, dozens of people died due to the extreme cold, snow and ice that plagued the state during the middle of the month. February's winter weather is potentially the most costly weather disaster for the state of Texas in history. If you thought it was unusually cold last month, you were right: Thanks to an invasion of the polar vortex, February 2021 was the USA's coldest February in over 30 years, according to a report released Monday by the National Oceanic and Atmospheric Administration. The last time the nation shivered though through such a cold February was in 1989.