There's also at least one article (well the only one I found was more recent in 2016 could have sworn I knew one from the 2000s, no amount of water in the one I read) out there of someone dying from drinking too much water while high. I want to say it was like 1-2 gallons in a fairly short amount of time, a few hours or something.

That said I've been high a ton and never got close to that amount of water so stay hydrated just don't down like a gallon in a couple hours, even extremely dehydrated I'm fairly certain our bodies aren't meant to process that amount of water, though too lazy to check amounts.