2017 DODGE CARAVAN Structurebody Problems

AFTER HEAVY RAIN OVER THE NIGHT, WHILE THE VAN WAS PARKED, A LOT OF WATER ENDED IN THE REAR INTERIOR, LUGGAGE AREA, SO IN THE MORNING WITHOUT A DRAINING PLUG I COULDN'T DRAIN IT OUT FROM UNDERNEATH, BUT HAD TO COLLECT IT WITH TOWEL AND PAPER IN ORDER TO PUT THERE MY FOOD I JUST BOUGHT. I GUESS THE GAP BETWEEN THE ROOF AND REAR-5TH DOOR IS TOO WIDE, BECAUSE I CANNOT SEE THE RUBBER WHICH GOES AROUND IS BAD. MY OTHER VEHICLE, PARKED BY THIS ONE, ALSO WITH 5TH DOOR STAYED DRY, AND THIS VAN HAS ONLY 100 MILES.