Before the torrential rains and floods in Australia there was the LA Basin flood of 2010. You guys know what I'm talking about. Remember those crazy photos from before Christmas where there was a foot of mud in downtown Newport Beach? Well, we pumped 20 gallons of water out of our semi-subterranean rec room. Thank god for shop vacs and a tile floor. The culprit was a walkway that sloped toward our house and a 6" hollow spot underneath that created an underground river when it rained. Well, we finally had it torn out and re-done.