UPDATE 7am: The fire is now under control.

A building fire in Maddingley has led to a toxic smoke warning for residents of the Bacchus Marsh area.

The fire is still not under control and toxic smoke is being blown in a westerly direction over Bacchus Marsh.

There is currently no threat to the community, but you should continue to stay informed and monitor conditions.

Anyone experiencing wheezing, chest tightness or difficulty breathing should call triple zero.

Via Vic Emergency