If the tank was drained and the power wasn't turned off at the panel, then it only takes seconds to fry an element.
If the top element is burned out, there will be no warmed water.
If only the lower element is burned out, and the top is still working, then you would only be heating the upper portion of the tank. You would have hot water, but not much.
The two thermostats and elements work in turns. First the upper and then the lower. The top of the tank must satisfy the thermostat first before the lower can take it's turn.