Texas is known for extreme heat but can also get other extreme weather including snowfall, here is a look at the largest snowfall totals in Texas history.
Seeing as rain is a natural occurrence, it would seem strange to some that capturing and then saving that rainwater would be illegal.
That being said, in some states, while it is not illegal to capture and save rainwater to care for animals or to water plants or crops, it is restricted when it comes to using that saved rainwater for human consumption.