OTTAWA, May 15 (Reuters) - A large wildfire threatening the major Canadian oil sands city of Fort McMurray moved closer overnight and weather conditions are unfavorable, the local authority said on Wednesday.

The fire is now just 5.5 km (3.4 miles) away from the city's landfill compared to 7.5 km late on Tuesday, the Regional Municipality of Wood Buffalo said in a statement.

(Reporting by David Ljunggren)