In February 2021, an extreme winter weather event affected energy supply and demand in Texas. The cold temperatures that increased demand for electricity and heating in Texas also disrupted energy supply, causing health and safety concerns. Because natural gas is used to generate a large share of the electricity in Texas (52% in February 2020, according to the U.S. Energy Information Administration’s (EIA) Electricity Data Browser), a drop in natural gas-fired generation during the cold weather event significantly affected total electricity generation.