Interestingly, the US doesn't have a true national power grid. https://www.epa.gov/green-power-markets/us-grid-regions https://www.epa.gov/green-power-markets/u

Interestingly, the US doesn't have a true national power grid. https://www.epa.gov/green-power-markets/us-grid-regions https://www.epa.gov/green-power-markets/us-grid-regions The practical difficulty of transporting large amounts of water long distances is even worse than electricity, so I don't think it'll ever be easy to say "Minnesota has a water surplus this year, let's just adjust the pipes to send it to Nevada".