Update at 5:40 p.m. The worst of today's energy emergency appears to be over. The Electric Reliability Council of Texas has canceled the Level 2B Energy Emergency Alert. However, ERCOT is still at 2A, and is urging people to conserve electricity until 7 p.m.
Earlier: The state's energy regulator said in a Tweet moments ago that there is now a "high probability" of rolling blackouts across the state. The Electric Reliability Council of Texas escalated the Energy Emergency Alert to Level 2B, meaning energy reserves are below 1,750 megawatts and continuing to decline.
ERCOT declared Level 2A at around 2:30 p.m., which triggered large factories, mostly along the Gulf Coast, to power down their operations in a bid to preserve energy reserves. It's the first time since rolling blackouts in February that ERCOT had initiated a Level 2A alert.