Parts of I-95 closed

DELTONA, Florida (CNN) -- Fast-moving brush fires in northeast Florida forced authorities Saturday to close parts of Interstate 95, and some residents fled their homes.

No injuries were reported from the fires burning north of Orlando in Flagler, Putnam, St. Johns and Seminole counties.

The Seminole County fire apparently began when a transformer blew up Saturday afternoon. CNN affiliate WFTV reported that up to 300 homes in Seminole County were affected.

Brush fires near Geneva, Florida
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In Putnam County, two brush fires were burning on more than 500 acres. The worst fire, near Georgetown, Florida, threatened more than 50 homes, said Eric Black, operations administrator with the Florida Division of Forestry. Fifteen crews from three fire departments were trying to douse the flames.

Black said firefighters hoped to have the fires contained by late Saturday night, but worried that they might flare up again as soon as the humidity drops and sea breezes pick up Sunday morning.

Flagler County sheriff's Sgt. David Malta told CNN that some residents of Palm Coast, in the southeast part of the county, had left their homes. Shelters were set up at Bunnell Elementary School and the Flagler County Courthouse.

Malta said part of I-95 was closed as a precaution, because of thick smoke. Authorities didn't know how the Flagler County fire started.

Fires also were burning on 1,000 acres in St. Johns County near St. Augustine. Nearly a dozen homes were burned, according to the Florida Division of Forestry.

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