Which attractions do you mean? I have been to WDW a lot and in a lot of pretty wild weather and have never encountered a ride closed due to the weather.
Umm, I was standing in FP+ line at 7DMT, watching the ever darkening and nasty sky. One of the CMs announced that the ride might be closing soon due to the approaching storm. Fortunately, the rain started just as I finished the ride and I was able to dash over to BOG for my ADR, not getting too wet. And noticed they had stopped the ride.