Hurricane Melissa has made landfall in Jamaica. A Category 5 storm, it is one of the strongest Atlantic hurricanes in history and could trigger a humanitarian disaster. Jamaica has never taken a hit from a Category 5, with a UN agency describing it as the "storm of the century." Follow live updates: https://cnn.it/47vdbkc | CNN

Meteorologists are now tracking three hurricanes simultaneously in the Atlantic. So what's the difference between Category 1 and Category 5? | CTV News