Wynne Davis

Updated at 6:52 p.m. ET

Isaias weakened from a hurricane to a tropical storm as it headed toward Florida's southeast coast on Saturday evening, but it is expected to restrengthen to a hurricane overnight. The National Hurricane Center is warning that tropical storm conditions are expected to begin Saturday night in Florida and is urging residents to prepare "to protect life and property."

Blues guitarist Peter Green, a co-founder of the band Fleetwood Mac, has died at the age of 73.

Representatives from the firm Swan Turton released a statement from Green's family on Saturday saying, "It is with great sadness that the family of Peter Green announce his death this weekend, peacefully in his sleep. A further statement will be provided in the coming days."

Updated at 5:15 a.m. ET Sunday

South Texas is braced for flooding after Hurricane Hanna began battering the state. The first hurricane of the season made landfall twice Saturday as a Category 1 storm.

The first landfall happened at around 5 p.m. about 15 miles north of Port Mansfield, which is about 130 miles south of Corpus Christi, according to the National Weather service. The second landfall took place nearby in eastern Kenedy County. The storm arrived with maximum sustained winds of 90 mph.

Nearly four months after it closed over coronavirus concerns, Disney World is once again inviting guests to experience its Florida theme parks.

The reopening comes as Florida is experiencing a surge of new coronavirus cases, with more than 10,000 being reported on Saturday.

Both Magic Kingdom and Disney's Animal Kingdom opened Saturday to the general public, following limited openings for annual-pass holders and employees. The other two area parks — Epcot and Disney's Hollywood Studios — are expected to open on Wednesday.

As the coronavirus outbreak continues across the U.S., the White House has told federal agencies and executive departments to suspend all work travel unless it is absolutely necessary.

The White House Office of Management and Budget issued new guidance on Saturday telling federal workers that "only mission-critical travel is recommended at this time."

The White House is also encouraging agencies to hold meetings by phone or video-conference whenever they can.