INVESTIGATORS believe a half-hectare grass fire at Dimboola might have been intentionally lit.
The Country Fire Authority issued an emergency warning for the town on Thursday afternoon because of a fast-moving, out-of-control grass fire near the weir at the end of Anderson Street.
The threat never eventuated, with the emergency warning downgraded shortly afterwards.
Country Fire Authority District 17 operations manager Dale Russell said the cause of the fire was being investigated.
He said investigators would determine if the fire was deliberately lit.
Emergency services were called to the Dimboola blaze about 5.40pm on Thursday.
CFA units from Dimboola, Antwerp, Pimpinio and Gerang Gerung and Department of Environment and Primary Industries fire-fighters had the fire under control by 6.10pm.
It was declared safe about an hour later.
Air support was dispatched, but not required.
Thursday was a total fire ban day in the region and temperatures soared to 41.8 degrees.