NBC September 5, 2018 4:10 pm Study Finds Pollutants After Storms Stay in Ocean Water Longer Than Initially Thought It is recommended that people wait 72 hours after a storm before getting into the ocean again. US & World Videos 0:28 A Vermont state trooper plunges into icy pond to rescue 8-year-old girl 2:59 Keep these travel etiquette tips in mind this holiday season 2:20 Bodies of Missing Men Found in Rubber Bins Inside Storage Unit 1:42 Hundreds of Golden Retrievers Walk a Mile for the Official Boston Marathon Dog 1:51 Typewriter Shop Owner Receives Gift From Tom Hanks