The lights are coming back on for millions of Texas residents who lost power, but utility officials are saying limited rolling blackouts are still a possibility if electricity demand rises. CNBC's Brian Sullivan reports. For access to live and exclusive video from CNBC subscribe to CNBC PRO: https://cnb.cx/2NGeIvi The Electric Reliability Council of Texas, which is known as ERCOT and controls the majority of the state’s power, said it has returned to normal conditions on Friday, as power has been restored for millions of customers who were left in the dark. However, the impacts from the deadly storm are still being felt across Texas. More than 184,000 customers in the state still do not have power as of 1:07 p.m. ET, according to the latest data from PowerOutage.us. Utility officials say limited rolling blackouts are still possible if electricity demand rises. At one point on Tuesday, more than 4 million customers were without power. While the heat might be coming back, parts of the state’s water supply might now be at risk after water pressure dropped, leading to potential contamination. Alison Silverstein, an independent energy consultant and former strategic advisor for the Federal Energy Regulatory Commission, said 20 million or more Texans could be forced to boil water. ERCOT officials said Thursday during a virtual news conference that the grid was “seconds and minutes” away from a far worse disaster, given the rate at which generation was going off the system. KXAN in Austin first reported the comments. Had ERCOT not cut power when it did, the entire grid would have gone down, according to Silverstein. Wintery conditions impacted power production from natural gas, coal, renewables and other sources, just as consumers turned up their thermostats amid frigid temperatures. The grid couldn’t match supply-and-demand dynamics. Natural gas production across Texas dropped about 30%, making it hard for power companies to find the gas they needed to run their power plants. According to some estimates, as much as 4 million barrels per day of crude oil production was taken offline. Energy prices initially rallied on the back of the production shutdowns but took a breather on Thursday with West Texas Intermediate crude futures and natural gas both dipping. WTI’s declines continued on Friday with the contract trading below $60 per barrel. Earlier in the week, WTI breached $60 for the first time since January 2020. Henry Hub natural gas futures gained 1.95% to trade at $3.137 per million British thermal units on Friday. For the week natural gas is up more than 7%. Texas Gov. Greg Abbott has called for an investigation into ERCOT. “The Electric Reliability Council of Texas has been anything but reliable over the past 48 hours,” he said in a statement Tuesday. “Far too many Texans are without power and heat for their homes as our state faces freezing temperatures and severe winter weather. This is unacceptable.” » Subscribe to CNBC TV: https://cnb.cx/SubscribeCNBCtelevision » Subscribe to CNBC: https://cnb.cx/SubscribeCNBC » Subscribe to CNBC Classic: https://cnb.cx/SubscribeCNBCclassic Turn to CNBC TV for the latest stock market news and analysis. From market futures to live price updates CNBC is the leader in business news worldwide. The News with Shepard Smith is CNBC’s daily news podcast providing deep, non-partisan coverage and perspective on the day’s most important stories. Available to listen by 8:30pm ET / 5:30pm PT daily beginning September 30: https://www.cnbc.com/2020/09/29/the-news-with-shepard-smith-podcast.html?__source=youtube%7Cshepsmith%7Cpodcast Connect with CNBC News Online Get the latest news: http://www.cnbc.com/ Follow CNBC on LinkedIn: https://cnb.cx/LinkedInCNBC Follow CNBC News on Facebook: https://cnb.cx/LikeCNBC Follow CNBC News on Twitter: https://cnb.cx/FollowCNBC Follow CNBC News on Instagram: https://cnb.cx/InstagramCNBC https://www.cnbc.com/select/best-credit-cards/ #CNBC #CNBCTV