While most wish the rain would go away after a soggy, flood-filled weather season, there are pluses — namely huge gains in water to help with the pesky drought that has been hanging around for half the decade. One of the most impressive gains of the season happened late last year, when NOAA found that Lake Tahoe added 8,690,131,707 gallons of fresh water between Dec. 9 and 11. If you’re trying to picture just how much water that is, here’s a handy fact: it’s the same amount as filling 13,158 Olympic-sized swimming pools, Forbes reported.