In Hong Kong, above, the storm rattled buildings, uprooted trees and grounded hundreds of flights.

Meanwhile Florence slammed into the Carolina coast in the U.S. as a Category 1 hurricane, leaving at least 14 people dead and hundreds of thousands without power.

We’ve dropped our paywall for storm coverage and live updates. Here’s how you can help those affected by Mangkhut and Florence.

And today’s word is eyewall: It’s a band of clouds that encircles the calm center of the storm, known as the eye. The eyewall is usually the most dangerous part of a storm, with the strongest winds and the heaviest rainfall. Here’s a 3-D look inside Mangkhut’s eyewall.

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