International Space Station captures view of Irma from orbit
Evacuation orders are multiplying across Florida as local officials try to get the most vulnerable populations to move to safety ahead of Hurricane Irma.
Miami Dade has now made evacuations mandatory for all of its coastal areas, barrier islands and mobile homes. Monroe County's mandatory order stands for the entire Florida Keys. Broward County's order remains voluntary for mobile homes and low-lying areas. Collier County issued a voluntary evacuation order for Marco Island.
County authorities across South Florida are making school buses available for people with special needs to get out.
Additional evacuations are expected throughout the state.