Low/No water pressure?
When the water to the whole building has been cut off and restored, sediment may clog lines.
To clear: Go to every bathroom and turn on the tub filler spout (NOT the shower head) on full hot until the line clears, then repeat with cold water.
To clear clogged filters/faucets/shower heads see: https://tinyurl.com/townarms or https://tinyurl.com/townarms2