SAN FRANCISCO (KGO) -- Hurricane Matthew is affecting more than just the people who live in the path of the monster storm.
It's causing headaches for travelers across the country.
Matthew is grinding air travel to a halt. Now almost 4,000 flights have been canceled.
PHOTOS: Hurricane Matthew bears down on U.S.
Expect the Ripple Effect to hit millions across the country.
Timelapsed radar shows the normally busy air traffic over Florida skies clearing out.
As for evacuees, they're worried about their homes but happy they could get out of the storm's path.
LIVE BLOG: Latest updates on Hurricane Matthew from ABC News
In an extremely rare move, Fort Lauderdale's airport shut down entirely Thursday but reopened Friday morning, which wasn't easy.
Workers had to sanitize the airport and re-certify it.
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Meanwhile, during this storm, Miami International Airport has halted all flights. Even Orlando International, an airport miles away from the shore, grounded all commercial flights.
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Even Walt Disney World has closed its doors, only the fourth time in the resort's history. Disney is the parent company of ABC and this station.
Airlines are still offering to waive change fees for some travelers because of Hurricane Matthew.
Click here for the latest on Hurricane Matthew.
Hurricane Matthew impacting air travel nationwide