You need to change your location in your profile from Hot Dry to Soaking Wet. If the rain hasn't bothered your pool structurally then don't worry. Just wait it out and deal with it when the rain stops. If there is any way to drain it down to normal level then do it. Then keep an eye on the pH as acidic water is not good for vinyl liners. Rain can be very acidic but it can vary greatly depending on your location. Mine is about neutral as there are no chemical plants, heavy industry or traffic anywhere close. Would be interesting to test the rain at least to see if it's on the chart. Also, send some rain up here but not all at once. Sorry about your 4th party...must be bumming. I'm hoping for sun and heat. Two nights ago the temp dropped to 44...on 29 June. Bah.
Al