TAMPA, Fla. -- An underground fire at the world's busiest airport is having a ripple effect worldwide, even forcing several flights at Tampa's airport to be delayed or canceled.

Several flights early Monday, Dec. 18, from Tampa International Airport to Hartsfield-Jackson Atlanta International Airport won't be taking off on time -- or at all, according to the hub's flight status page.

Arrivals from Atlanta appear to be operating without issue as of this writing.

Two departures Atlanta from Sarasota-Bradenton International Airport were canceled as well, according to its status page.

Flyers on Delta Air Lines and Southwest Airlines mostly have been affected. Shortly after the fire and resulting power outage Sunday, nine flights were canceled from Tampa to Atlanta.

It could be several days before the backlog of flights is processed through Atlanta. An aviation expert told the Associated Press it could be Tuesday before Delta's operations return to normal but longer for passengers as there aren't many open seats the week before Christmas.

If your literary takes you to Atlanta, check with your carrier on the latest flight status and what to do next:

Delta Air Lines' website

Southwest Airlines' website

It's believed the source of the power outage at Atlanta's airport was an underground fire that damaged an electrical facility. Power was restored to the hub just before midnight.

The airport tweeted early Monday operations slowly are returning to normal:

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