Hurricane Irma School Closings: List of Districts, Colleges and Universities Canceling Classes Ahead of Storm

Most of the Sunshine State was in Hurricane Irma's cone of uncertainty on Wednesday as the intense storm continued to barrel toward Florida. But despite the lack of details about the system's exact track, schools were already taking action.

More than a dozen districts across the state made the call Wednesday to cancel classes and after-school activities for the rest of the week due to the storm. Several colleges closed, too, with many forcing their students to evacuate off campus to safer areas.

Related: Florida Sheriff Says He'll Arrest People Fleeing Hurricane Irma If They Have Open Warrants

As of Wednesday afternoon, Irma was a Category 5 system with maximum sustained winds of 185 mph and the potential to cause life-threatening storm surge, according to the National Hurricane Center.

The school closings aren't entirely unusual: While some parts of the country have snow days, Florida has hurricane make-up days built into its academic calendars. Storms like Irma not only pose security risks for students and staff but also cause many institutions to convert into shelters for local residents. For example, the American Red Cross took over the Aldine Independent School District's M. O. Campbell Educational Center near Houston last week because of Hurricane Harvey.

Here's a list of school districts that have announced closings so far:

Brevard County Public Schools: Closed Thursday and Friday. School activities called off, and district headquarters shut down.

Broward County Public Schools: Closed Thursday and Friday. All Wednesday afternoon activities are canceled through the weekend.

Hernando County School District: Closed Thursday and Friday. All Thursday and Friday after-school activities canceled as well.

Indian River County School District: Closed Thursday and Friday.

Manatee County School District: Closed Friday, but open Thursday.

Marion County Public Schools: Closed Friday and Monday.

Martin County School District: Closed Thursday and Friday. All events canceled.

Miami-Dade County Public Schools: Closed Thursday and Friday.

Osceola County School District: Closed Friday and Monday. All school events are canceled.

Palm Beach County Public Schools: Closed Thursday and Friday, as are district offices. After-school activities canceled starting Wednesday afternoon.

Pinellas County Schools: Closed Thursday and Friday, as are all events.

Polk County Public Schools: Closed Friday, as are district offices. School absences excused for Thursday.

Sarasota County Schools: Closed Friday.

St. Lucie Public Schools: Closed Thursday and Friday. All events canceled starting Wednesday.

Volusia County Schools: Closed Friday and Monday. All events rescheduled or canceled.

And here are colleges and universities that have confirmed schedule changes:

Florida Institute of Technology: Classes canceled Friday through Monday. "Faculty members are asked to exercise leniency regarding any hurricane-related absences" for Thursday.

Florida International University: Classes canceled Wednesday until further notice. Campus closed starting Thursday, and all students are urged to leave.

Miami Dade College: Campus closed starting at 4 p.m. Wednesday.

St. Thomas University: Classes and events canceled starting at 3 p.m. Wednesday through the weekend. Students are under mandatory evacuation orders.

University of Central Florida: All academic programs and classes canceled Thursday through Monday. Campus closes Friday, though Spectrum Stadium will be open for the football game.

University of Miami: Classes canceled Wednesday, Thursday and Friday.

University of South Florida: Classes canceled Thursday through Sunday, with certain campuses closed Monday, as well.

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