Tropical Storm Nicole, now downgraded to a tropical depression, is causing airport delays from Florida through Boston on Thursday and flooding in many coastal areas.
In western Jamaica, four people drowned and several were reported missing late Wednesday.
Airports in Montego Bay and Kingston are open, but both report many flight delays. Many secondary roads and bridges are blocked and flooded.
Nicole dumped heavy rains over Cuba, the Cayman Islands, the Bahamas and South Florida on Wednesday.