Nearly all lakes in North Texas saw some type of lake snow effect, especially the larger bodies of water such as Lake Lewisville. “We get a similar effect just on a much, much smaller scale,” Dunn said.

The state’s grid system infamously failed during a winter storm five years ago, which left millions without power and led to more than 200 deaths.

Officials are optimistic the power grid will hold, but freezing rain and arctic cold could cause localized electricity outages in the coming days.

All San Antonio-area H-E-B stores, including shops in Cibolo, Floresville, Schertz, Pleasanton, Fair Oaks, Leon Springs and Lytle will be open from 9 a.m. to 11 p.m. on Sunday. San Antonio's lone Central Market store opened at 8 a.m. on Sunday.

Forecasters say Sunday night and Monday night could be pretty bad.

This North Texas winter weather guide provides the latest Dallas-Fort Worth snow and sleet totals, NWS timing for Winter Storm Fern and essential tips for protecting pipes and the Texas power grid during the current Extreme Cold Watch.

Wintry conditions across a broad section of US led President Trump to approve federal emergency disaster declarations as the storm system impacted millions.

Rain and freezing rain is expected to continue across Southeast Texas early Sunday, but ice totals will depend on temperature.