I think my experience is one off and may not happen to others. I'm capturing it so that you can watch out for similar incidents - here or elsewhere.
One of the mornings, the water on the hot setting was running cold. I didn't have time to check and find out the issue and the host wasn't home. So I took cold water shower in Seattle in March!
Good news: The issue was fixed by the evening. Looks like the heater had shut off.
The heater setting was a bit low and it was cold most of the time. The host provides an extra space heater. You may want to use after checking with him.