You're thinking of MWh, this is MW.

Meaning at a given moment of peak usage, it's drawing that many MW. If it draws that much for 1 hour, then it consumed that many MWh.

A year's worth of 5 households' power consumption is one hour of peak operation is pretty bad...

You'll need to give me a source for those numbers. My 1,300 square foot house has a 200 ampere main breaker, so I can't draw more than about 0.024 megawatts. It would therefore take more than two thousand similar-sized houses to draw 53 megawatts—and that's only at full power draw, which I never come remotely close to.

Also it's worth mentioning that timespans don't actually matter here: monthly usage and annual usage are the same number when dealing with watts. When a source says "average annual power consumption", they likely mean that the power measurement is averaged throughout the year and that hot/cold seasons are accounted for.

If you wanted to do math involving time, you would need to use watt-hours (or kWh, MWh, etc.), for which time is a factor. For example, if you drew a constant rate of 1 kilowatt for a full day, you would have 24 hours * 1 kilowatt = 24 kilowatt-hours.

That MW figure has no timescale. it is a peak metric from one instant. 53 MW for one second = ~0.015 kWh 53 MW for one hour = ~53 MWh 53 MW continuously for one day = ~1.26 GWh 53 MW continuously for one year = ~462 GWh There is no guessing as to how often that one datacenter operates at peak power consumption.

53Mw constant utilization is a small datacenter in AI terms