MIAMI, Fla. -

A large section of south Florida saw heavy smoke in the air because of a brush fire in the Everglades. 

The fire sparked by a a lightning strike Sunday burned some 20,000 acres.  Smoke and heavy ash still lingered in the air Monday.  

According to authorities, the smoke was across the western suburbs of Fort Lauderdale and Miami and even east of Biscayne Bay. 

The Miami Herald reports the smoke caused haziness forcing Florida Highway Patrol to close part of U.S. 27.   Forestry officials say the smoke stayed low because of variable winds and low dispersion.