The document states that in the event of the external power lines to the plant being disconnected from Ukraine “a procedure for voltage transmission … from the unified power system of Russia” had “been developed”.

Considering that it’s easier to find water on Mars than in Donetsk right now, and Pushilin’s explanation as to why there’s no water and sewage there was “Ukraine didn’t repair the pipes” - I wouldn’t really count on Russian infrastructural development to save the day, especially if that’s not a propaganda project like Kerch bridge.

So yeah, start panicking.