How the largest energy-producing state in the US failed in freezing temperatures

ERCOT Twitter shows how out of control the situation got for them in only an hour's time Sunday night into Monday.

ERCOT has declared an EEA 1. Energy conservation is needed. There are no rotating outages at this time. 00:17:45 150221

ERCOT has declared an EEA 2. Consumers are urged to reduce electricity use. Rotating outages may be needed to protect the system. 01:12:06 150221

ERCOT has declared an EEA 3. Energy conservation is critical. Rotating outages are underway to reduce demand on the electric system. We urge Texans to put safety first during this time. Traffic lights and other infrastructure may be temporarily without power. 01:25:40 150221