Hurricane Dorian keeps looking worse for Florida, with 10 million people in harm's way on a busy Labor Day weekend, the AP reports.

The big picture: If Dorian makes landfall as a Category 4, it'll be the biggest since Hurricane Andrew in 1992.

• The storm has intensified to a Category 3 and is expected to be a Category 4 when making landfall Monday or early Tuesday.
• Uncertainty on landfall makes evacuating harder: “Sometimes if you evacuate too soon, you may evacuate into the path of the storm if it changes,” Gov. Ron DeSantis said.
• Weather Channel expert Rick Knabb warns: "Possibility of very slow-moving #Dorian spending way too much time over major metros in Florida. Major hurricane? Bad. Also a slow mover over densely populated areas? Worst kind of hurricane."

A very 2019 footnote: Miami "has told all rental services to get their [electric scooters] off the streets ... lest they fly perilously through the air when Dorian reaches land," reports Bloomberg.

What's next: The Bahamas face Dorian's wrath this weekend, the National Hurricane Service notes.

• "Hurricane conditions are possible in the northwestern Bahamas by Sunday, with tropical storm conditions possible by Saturday night or Sunday morning."
• "A life-threatening storm surge will raise water levels by as much as 10 to 15 feet above normal tide levels in areas of onshore winds in the northwestern Bahamas."
• Per WashPost: "The storm surge will be exacerbated by naturally occurring astronomical high tides, which are some of the highest of the year this weekend into early next week."

A lush forest sits next to a field of charred trees in Vila Nova Samuel, Brazil.

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Controversy for Getaway Day: A new Trump administration order will allow e-bikes on every federal trail where a regular bike can go, the AP reports.

• The case for them: E-bikes “make bicycle travel easier and more efficient, and they provide an option for people who want to ride a bicycle but might not otherwise do so because of physical fitness, age, disability or convenience,” said National Park Service Deputy Director P. Daniel Smith.
• The case against: “If you’re hiking on a trail in Utah and you’re rounding a bend and something’s coming at you at 20 mph, that really changes the experience,” said Kristen Brengel of the National Parks Conservation Association.