Simplify the following text for a Grade 5 native English-speaking person.
Original: Iris continued to the west and intensified . After passing just south of Jamaica , Iris reached Category 4 hurricane strength , and made landfall near Monkey River Town , Belize on October 9 at Category 4 strength , but weakened rapidly .
Simplified: When Iris had its top winds it made landfall in Belize , which was on October 9 .