Due to" is not a replacement for "as a result of" because it is an incomplete sentence.
The correct use of "due to" requires a verb (is, are) in front of of it. So, saying "due to the storm, the game was postponed" is incorrect. You may say "as a result of the storm, the game was postponed". If you wish to use "due to", you should say something like "the postponement of the game was due to the storm".