In news stories about the countries suffering from energy crisis it is said that, let's say, the electricity shortfall has reached 3,000 MW while the generation is 5,000 MW and demand 8,000 MW. Watt is used for rate of energy, energy flow per unit time. Are they talking about the shortfall in average terms? Perhaps, the shortfall keeps varying, at times it is over 3,000 and sometimes below the indicated value, but when taken average it's 3,000 MW. Do I have it right? Please let me know.