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.

Updated at 4:28 p.m. ET

The U.S. State Department is sending a charter plane to evacuate Americans aboard the Diamond Princess cruise ship that is in quarantine in Japan because of the spread of the coronavirus named COVID-19.

On Saturday, the U.S. Embassy in Tokyo sent a letter to U.S. citizens aboard the ship informing them of the planned extraction scheduled for Sunday night.

Clearing skies were welcome news for residents in Oregon and Washington this weekend following days of heavy flooding that has forced evacuations and untold millions in damage.

This week's flooding followed a particularly wet month of January, even for the Pacific Northwest. In some parts of the region, rain fell on 28 out of the 31 days in January. Snowmelt compounded flooding, pushing several rivers in the region to crest their banks.

Updated at 2:11 p.m. ET

Two U.S. service members were killed and six more wounded during an attack on a joint operation between American and Afghan forces on Saturday in eastern Afghanistan.

Early indications suggest that the two service members were killed in what's known as a green-on-blue attack, in which Afghan forces or infiltrators turn their weapons on U.S. and coalition troops.

From a launch pad at the Kennedy Space Center on Sunday, Elon Musk's SpaceX launched its latest rocket test into the Florida sky. Less than two minutes later, it exploded — just like the company hoped it would.

The explosion itself wasn't so much the success as was what came just before it. That's when the Crew Dragon, a capsule meant to carry astronauts into space, separated from the rocket. That separation was the goal of Sunday's test.

Five people are dead and at least 60 more are injured after a multivehicle crash along the Pennsylvania Turnpike early Sunday morning.

The crash took place at about 3:40 a.m., approximately 30 miles from Pittsburgh, as a tour bus traveling to Cincinnati rolled over and was then hit by two tractor-trailers, according to Stephen Limani, a public relations officer for the Pennsylvania State Police.

Limani said the crash was similar to a chain reaction and involved a bus operated by the Z&D Tour company.

Updated at 3:46 p.m. ET

A U.S. service member and two Defense Department contractors were killed Sunday when the terrorist organization al-Shabab attacked a Kenyan airfield used by both Kenyan and U.S. forces.

Two Defense Department members were also injured in the attack, according to United States Africa Command. They are said to be in stable condition.

Dinner parties often come with expectations and stress, but author Alison Roman wants you to know it doesn't have to be that way.

In her new cookbook, Nothing Fancy, Roman stresses that preparing dinner for others doesn't have to be a piece of performance art. It's dinner and doesn't have to be perfection.

"I feel like taking the word entertaining out of something just immediately alleviates anxiety, because what I realized is also when you rebrand it as having people over, it not only makes you feel less anxious, but your guests, [too]," Roman says.

The Houston Astros beat the Washington Nationals 8-1 in Game 4 of the World Series to tie it up 2-2.

After losing the first two games at home, the Astros came back to win Game 3 in Washington and continued that momentum through Game 4.

Second-baseman José Altuve was the first Astro to get on base in the first inning while facing Washington's starting pitcher Patrick Corbin. Left-fielder Michael Brantley came up next with another single before third baseman Alex Bregman hit an RBI that gave the Astros their first run of the night.

Kenya's Brigid Kosgei won the Chicago Marathon on Sunday with a time of 2 hours 14 minutes 4 seconds, breaking the previous world record by 81 seconds.

At 25, the Kenyan defended her title after winning last year's event, and put almost 7 minutes between herself and her competition. Both from Ethopia, Ababel Yeshaneh finished second with a time of 2:20:51 and Gelete Burka came in third at 2:20:55.

The previous world record time of 2:15:25 was set by Britain's Paula Radcliffe in 2003 at the London Marathon.

After yet another standout performance, star gymnast Simone Biles can now add two more signature moves that bear her name to her already lengthy list of accomplishments.

In order for a gymnast to have a move named after them, they must submit it for consideration and successfully land it at a major competition, such as the world championships or the Olympics.