Clicking G and looking down has you pull out some device on your wrist which shows how much power and sanity you have.
The tablet DOES show an icon on the bottom left when a room has a power outage.
Fun concept and nice animations. I only have two issues with the game right now:
You can't strafe (sorry for being the 743rd person to say it, but it's really clunky) and the crawling/vent system is unbearably slow and awkward.