Grid operators deployed emergency measures to keep lights on as extreme weather drives heating demand and strains natural gas delivery systems nationwide.

The Electric Reliability Council of Texas, which manages the state’s main power grid, has a dashboard that allows residents to track current conditions and usage. The timestamp of each dashboard indicates when the information was last updated,

The largest U.S. power grid PJM said on Tuesday it had issued extra alerts to transmission and generation firms as a monster winter storm looked set to bring unprecedented energy demand.

This useful dashboard tracks the conditions of the Texas power grid.

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