UPDATE SUNDAY 5 p.m. PST: Ernest Hemingway’s historic home on Key West, its employees and its famous 54 cats are all safe after Hurricane Irma passed through the Florida Keys early Sunday morning, the home’s executive director told MSNBC.

Dave Gonzales of the Ernest Hemingway Home and Museum told the network’s Ali Velshi that the house weathered the storm with little damage and that all its six- and seven-toed cats are OK. However, the employees are without electricity, water or internet service. Fortunately, they stocked up on plenty of water and food, and they have three generators working.

“Best news of the day,” tweeted one user.

WATCH: Curator: Hemingway House in the Keys is intact — and the 54 six-toed cats are safe — after Hurricane #Irma. https://t.co/MwjXQqHx9Z — NBC Nightly News with Lester Holt (@NBCNightlyNews) September 11, 2017

MSNBC has confirmed that the Hemingway cats on Key West are all safe. Best news today. #Irma — Matt Vacek (@MIB1188) September 10, 2017

@TheRickWilson Gentlemen from Hemingway House…(MSNBC) No major flooding Key West… House weathered the storm w/o damage. Cats are 👌 — Belle (@bellestarr48) September 10, 2017

Early Sunday morning, Irma, then a category 4 storm, slammed into the Florida Keys, reportedly filling waterfront streets with surging seawater and knocking out power.

This was posted from the Hemingway home Saturday evening:

Hurricane Irma: Staff at Ernest Hemingway house defy Florida evacuation order and hunker down with author's famous… https://t.co/JdHgxL9SdL pic.twitter.com/EcrTYvvQ0F — NewsReddit (@NewsReddit) September 10, 2017

ORIGINAL STORY from 7 a.m. Friday: Actress Mariel Hemingway thinks it’s noble that the 72-year-old general manager of her grandfather’s historic Key West home wants to stay and try to safeguard the property and its famous six-toed feline residents as Hurricane Irma comes barreling in.

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But she’s begging Jacqui Sands to leave the Ernest Hemingway Home and Museum to protect her life.

“I think you’re wonderful and an admirable person for trying to stay there and to try to save the cats and the house,” the Academy Award-nominated actress said in a video posted by TMZ.

“This is frightening. This hurricane is a big deal,” she said, adding that she should, yes, save the cats if she can.

“Get in the car with the cats and take off,” she said.

The legendary author’s home, where he wrote “A Farewell to Arms” and “The Snows of Kilimanjaro,” is in the path of Irma, which is now categorized as a category 4 hurricane and is expected to hit the Florida Keys and other parts of southern Florida Saturday evening.

General manager Sands is tasked with securing the property and ensuring the safety of the 55 cats that freely roam there. Many of the cats are believed to be descendants of the author’s cat, referred to as either Snow White or Snowball, and have the distinctive six and seven toes on one paw.

Sands won’t be there alone with the cats. She’ll be joined by nine other employees, who have helped to stock up on food, water and medication for the cats and to board up windows and doors. They also have three generators to keep the power and air conditioning going. The other employees couldn’t leave because either they don’t have a car or couldn’t find a flight out, she said.

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“I think we are going to be fine,” she added.

That confidence was echoed by the museum’s executive director Dave Gonzales, who told the Houston Chronicle that the 1851 French colonial home has 18-inch thick limestone walls that allow it to withstand dangerous storms.

In an interview with CNN Friday, he said those walls make the house “the strongest fortress in all the Florida Keys.” He also said earlier: “This isn’t our first hurricane. We’re here to stay.”

He added that at 16 feet above sea level, the house is not in a flood zone. As for the cats, he said they are adept at surviving storms, and the home has never lost a cat to a hurricane. A tweet posted Saturday evening showed that the cats were safe:

Best news of day- all 54 cats @ernestHemingwayHouse safe & inside! pic.twitter.com/pn4D9PWInc — Ann Marie Hoff (@Annimallover) September 10, 2017

“Cats know naturally when to go. As soon as the barometric pressure drops, they come in,” Gonzalez said. “They know before humans do when it’s time to get in.”

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But Mariel Hemingway isn’t so confident and points out that “it’s just a house.”

She acknowledged that “none of us likes to lose things we treasure” but “ultimately you’ve got to protect your life.”

Hemingway then referred to that famous idea espoused by her grandfather in his prose.

“Courage is grace under pressure,” she said. In this case, “I think this is taking things a little too far.”