Texas is either desert or desert adjacent. We have always gotten our water by having torrential rains inconsistently.

This doesn't mean don't conserve, be intelligent, etc.

But this does mean that your water won't "balance out" year to year, you need to look at big 25-30 year intervals.

Right now the single biggest waste of water in Austin is leaky pipes. Like infrastructure pipes owned by the city. Meanwhile our water conservation budget is going to billboards telling people to rush in the shower. The entire population could stop bathing and not reduce enough to make up for the leaks happening in the crumbling water infra.