Hurricane season 8 hours ago Why are there no Category 6 hurricanes? The Saffir-Simpson scale is used to measure the speed of hurricanes. Why does it stop at Category 5? US & World Videos 2:05 Celine Dion shocked over Gatorade pour in Sunday Night Football appearance 1:35 Justin Timberlake gives shoutout to wife Jessica Biel during show on their 12th anniversary 1:13 What is Indigenous Peoples' Day? 1:38 Meghan Markle makes surprise appearance at Children's Hospital LA gala 1:10 American scientists win Nobel Prize for the discovering of microRNA