> Plus, practically, a 1:70 tail event is usually outside a regulator's tolerance for preparation too. It was the 3rd such event in 32 years. From the wiki ar

> Plus, practically, a 1:70 tail event is usually outside a regulator's tolerance for preparation too. It was the 3rd such event in 32 years. From the wiki article: "In 2011, Texas was hit by the Groundhog Day blizzard between February 1 and 5, resulting in rolling blackouts across more than 75% of the state.[26] Many roads around Houston were impassable, and boil-water advisories were issued in several areas.[27] Following this disaster, the North American Electric Reliability Corporation made several recommendations for upgrading Texas's electrical infrastructure to prevent a similar event occurring in the future, but these recommendations were ignored due to the cost of winterizing the systems.[28] At the time the blackouts and failures in the power grid were likened to those that occurred in December 1989, after which similar recommendations were made to the state government and ERCOT, which were similarly ignored."