I clicked ahead to the following day.

The same spike was there.

I went through the whole month.

The pattern repeated with machine-like regularity.

The heavy use only came between two and five in the morning, and only on weeknights.

I opened another tab and signed into the city water portal.

The daily water usage lined up with the electric data.

Fifty gallons of water ran through the pipes at four in the morning on those same weeknights.