Richard Fain, Royal Caribbean Group's CEO, said:
"This tragedy in our own backyard is heart-wrenching.
"Our thoughts are with the families and our whole community, and our thanks go out to the hardworking search and rescue teams. Providing them shelter is a small way to show our support."
The company will provide individual staterooms, Wi-Fi, hot meals, and laundry service to its guests.
Explorer OTS, now docked at PortMiami, was brought in specifically to provide lodging for rescue teams as hotels and other accommodations in the area fill up due to the July 4 holiday weekend.
Hurricane Elsa could complicate the situation should it veer closer to South Florida. The ship may have to leave Miami if the threat becomes more serious.