Comment by flextheruler

Solar, wind, and even hydroelectricity are too dependent upon the environment to make up the entire electricity generation capacity of any major industrial country. With renewables, even with batteries, the actual production is within a range. Couple that with demand also being in a range you get uncomfortable possibilities at play. And while colder water is definitely preferable for cooling, I'd have to imagine that if the bodies of water were actually becoming too hot to cool a nuclear reactor system there'd be bigger problems than energy production.