There's long been a dispute about the use of "due to", with presciptivists arguing that it should only be used in an adjectival context.
So, "The cancellation of the concert was due to the rain." is OK, because 'due' functions as an adjective modifying 'cancellation'.
But "The concert was cancelled due to the rain." is theoretically wrong, with 'owing to' or 'on account of' being the correct construction.
The use of 'due to' is so common, however, and of such long standing, that it seems to have worn down the objectors and entered the realm of acceptability. 'Owing to' and 'on account of' can come across as being a little stiff.
'Because of' is also an alternative, although because 'because' is a coordinating conjunction, it's generally regarded as bad style to use it at the beginning of a sentence, even though it's not 'illegal'.