A Closer Look at What Happened in Texas During the Deep Freeze:

While no statewide records were broken, some of the records that were reported were quite shocking to say the least. The two coldest days were Monday, February 15 and Tuesday, February 16, where temperatures were some 40-50°F below average across Oklahoma and Texas. Between February 11 and 18, temperatures across much of the Heartland averaged some 30°F below average (Figure 2).³ Temperatures this cold for such a sustained period can lower the monthly and seasonal average by a wide margin.