From MDT website:
During windy conditions, transit passengers are encouraged to remember that while waiting for a Metrorail or Metromover train, they should avoid standing at the edge of the platform and provide security officers and transit personnel their full cooperation.
Transit operations
Miami-Dade Transit, including Special Transportation Service, will begin to cease operations and evacuations three hours prior the estimated arrival of tropical storm force winds (of sustained winds of 39 miles per hour) to Miami-Dade County.
Miami-Dade County residents and visitors are encouraged to register to receive Rider Alerts to stay informed of the latest transit updates. If service needs to be temporarily suspended due to worsening of weather conditions, DTPW will send out Rider Alerts, and inform its riders through its social media platforms (Twitter and Facebook), as well as the Department’s website and app. Transit users can always call 3-1-1 to speak with an agent.