The Ross University School of Medicine, based in Portsmouth, Dominica, announced on Facebook that it is attempting to make contact with all of its students. More than 1,400 students and faculty have signed the registration sheet so far, and the school has reached out to the family members of more than 700 others, who informed them that they are safe.

Officials in Guadeloupe announced Wednesday that two people were killed and two others were missing due to the storm.

France's Interior Minister Gerard Collomb said some 80,000 people in Guadeloupe -- around 40 percent of the population -- were without electricity Wednesday. Many roads there are impassible due to flooding and French Navy planes have not been able to assess the damage on the island due to bad weather conditions.

In Martinique, about 70,000 homes were without electricity and 50,000 homes did not have access to safe drinking water Wednesday. Fallen trees and downed power poles have blocked many roads there, Collomb said.

Police and soldiers have been deployed in both Martinique and Guadeloupe to ensure security. More than 3,000 first responders are on the French Caribbean islands, according to Collomb.

ABC News' Benjamin Gittleson, Joshua Hoyos, Paul Pradier and Victor Oquendo contributed to this report.

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