( CNN ) -- A brush fire near Tampa , Florida , prompted authorities Saturday afternoon to shut down Interstate 75 in both directions , a local sheriff 's office said . The blaze was centered in Ruskin , about 20 miles south of Tampa near Florida 's Gulf coast , according to the Hillsborough County Sheriff 's Office . First reported as extending five acres , the fire eventually grew to 50 acres , said Hillsborough County Fire Rescue spokesman Ronnie Rivera . Southbound traffic was being diverted off the highway at Sun City Center `` due to zero visibility . '' For a time , vehicles likely were also prohibited from moving northbound . The closure extended for 11 miles -- between mile markers 229 and 240 -- the Florida Department of Transportation reported on Twitter . By 3:15 p.m. , the fire was contained -- although , by then , a mobile home was destroyed and several vehicles had burned , according to Rivera . Conditions had improved enough to allow for I-75 traffic to resume moving northbound ; southbound traffic was still stopped because of poor visibility . The National Weather Service had issued a hazardous weather outlook for the area , warning that `` dry fuels and low relative humidity will result in favorable conditions for the spread of wild fires . '' Saturday 's forecast for Ruskin was for mostly sunny skies with high temperatures around 76 degrees and sustained south-southwest winds of around 10 mph . Conditions should be even warmer and windier Sunday , the weather service predicts , with a high near 80 degrees and winds gusting as strong as 21 mph . Video on CNN affiliate WFTS 's website showed white smoke rising near the highway -- as throngs of vehicles in one direction sat seemingly at a standstill -- and mingled with puffs of clouds on an otherwise picture-perfect spring day . CNN 's Jennifer Moore contributed to this report .
NEW : The 50-acre fire , which burned a mobile home , is contained . NE : I-75 northbound reopens , though southbound traffic was still blocked around 3:15 p.m . The fire had caused the highway 's closure due to ` ` zero visibility , '' a sheriff 's office said . The National Weather Service warns of ` ` dry fuels and low relative humidity '' in the area .