More than 24 hours into a widespread power outage, more than 40% of Austin Energy customers are still impacted. "Due to grid stability concerns, ERCOT is still not allowing us to restore power," the utility tweeted in a 7 a.m. update.

ERCOT, or the Electric Reliability Council of Texas, which manages about 90% of the state's electric load, officials said they are "optimistic" that the will be able to reduce the number of power outages throughout the day. Although ERCOT reported that it had restored power to 500,000 Texas households Monday evening, more Austin Energy customers are facing outages Tuesday morning than the day prior.

Other electricity companies are also facing outages, according to their outage maps. More than 35,000—or nearly two-thirds—of Oncor customers in Travis County are currently impacted. Pedernales Electric Cooperative, which serves customers in Georgetown, Marble Falls and San Marcos, among other cities outside of Austin, reported that 46.8% of its customers were without power Tuesday morning. Another 4,400 Bluebonnet Electric customers in Travis County are also experiencing outages.

Austin residents may also face water outages due to broken water mains and internet outages related to the weather.

By Monday evening, four water main breaks had been reported to Austin Water, and the utility said that about 20 customers were out of water due to ongoing repairs in an update. "Austin Water has several hundred field personnel responding to water related concerns and will rotate shifts as necessary to restore service or assist customers to restore private service," according to the utility.

Major internet and cellular providers are also experiencing service interruptions, according to Downdetector, which tracks self-reported outages and social media posts.

Spectrum and T-Mobile customers seemed to face the most challenges, according to Downdetector's data, which shows hundreds of locally reported issues with those carriers. Verizon, AT&T and Sprint users also saw spikes through Monday.

Spectrum attributed Texas service interruptions to the weather, which is "causing commercial power outages and downed lines," in a tweet on Monday.