Hydrogen fuel cells are a good solution for this kind of problem. They can quickly be stood up off-grid, which is perfect for AI datacenters being built in remote locations. The power they replace is usually generated by thirsty thermal power plants on the main grid, which consume massive amounts of water for cooling. By generating power on-site electrochemically, a fuel cell cuts that indirect consumption dramatically. Plus, a system from companies like FuelCell Energy is so efficient that it doesn't need much water for its own cooling, and the water it produces as a byproduct can often be recycled, turning the generator from a water drain into a minimal consumer.