Rip currents are strong, fast-moving water that pulls swimmers away from the shore. More dangerous than jellyfish or sharks, they cause many beach rescues and recent deaths in Florida. The National Weather Service has reported many incidents this year in Florida, Puerto Rico, and Texas. Rip currents cause about 100 drownings in the U.S. annually and account for over 80 percent of beach rescues. They can form near low spots, jetties, or piers and can occur in calm and stormy weather, moving up to eight feet per second. Experts advise swimmers caught in a rip current to swim parallel to the shore instead of directly back. Beaches use colored flags to indicate risks: red for high danger, yellow for medium danger, green for low danger, purple for dangerous sea creatures, and double red for closed beaches. The National Weather Service can forecast rip currents up to six days ahead. Beachgoers should swim near lifeguards, avoid swimming alone, ensure adult supervision, and check their swimming abilities before entering the water.