Winter Storm Uri (2021)
A severe cold snap froze gas wells, wind turbines, and power plants across Texas at once. ERCOT ordered rolling blackouts that stretched for days. Millions lost heat and water in freezing homes.
State officials put the death toll in the hundreds. The grid came within minutes of a total, weeks-long collapse.
Texas overhauled its power market rules and pushed weatherization and new generation. The failure became the benchmark against which every later grid test is measured.
Uri is why a record without a blackout is news. The July 2026 peak shows how much the grid changed in five years.
