hurricane joaquin strengthening overnight as dangerous flooding threatens 58 million people. the monster category 4 hurricane is slamming the bahamas. the east coast scrambling to clear drains, another system is set to dump records amounts of rain. states of emergency in south carolina, virginia and in new jersey. chad myers is here with more. hi, chad. >> hi, carol. two separate systems. one upper low over the southeast and one hurricane with just a moisture feed from the caribbean will get together and push all of this rainfall all the way from new england back to the carolinas. my focus is on the carolinas where we'll see significant rainfall, where significant moisture comes up, dragged by the jet stream. a big dip in the jet stream and then a big rise. this backwards, see how it's going back to the west, this was always the factor in whether the hurricane here would get dragged back up into the u.s. that was always why some of the