Axios

Florida Gov. Ron DeSantis (R) declared a state of emergency for all of Florida on Saturday as Tropical Storm Ian approached the state.

Driving the news: Ian, which formed Friday over the southern Caribbean, was forecast to intensify through Monday, possibly into a high-end Category 4 storm.

Tropical Storm Ian, which formed late Friday night over the southern Caribbean, is set to intensify into a powerful hurricane during the next few days.

The big picture: The National Hurricane Center is now predicting Ian will develop into a Category 4 storm within the next 72 hours. Ian's path still is forecast to cross over portions of Cuba and then turn northward into Florida by midweek.

Hurricane-strength Fiona made landfall in Nova Scotia early Saturday and knocked out power for hundreds of thousands in eastern Canada.

Driving the news: More than 540,000 outages were reported in Atlantic Canada, according to utility tracker Poweroutage.com. Almost all of Prince Edward Island's 86,000 customers are among the outages.