can you take a shower when the power is out

Yes, you generally can. The availability of hot water depends on the type of your water heater. If it is a traditional tank-style heater powered by gas or propane, you might still have hot water for a while even if the power is out.

In case of an electric water heater, it can't heat water without electricity. Therefore, you might only be able to take a cold shower. However, you'll still have access to cold water as long as the supply is not compromised.

If the power outage is prolonged, preserving the available hot water you have would be a smart move. It is also recommended to have a supply of stored water for hygiene purposes in such cases.