I have a funeral of a family member in Canada and my passport has expired. Is there a way I can still go to the funeral? If so, what do I need to do? I am a U.S. citizen.
I presume that you are not in Canada, because if you were you would not be asking the question.
If you are a Canadian or US citizen and you are in the US, you can cross into Canada at a land border with proof of identity and proof of citizenship. For example, you might use a driver's license for the former and a birth certificate for the latter. This approach is not without its problems, however, including potential difficulties returning to the US. The difficulties and their resolutions depend on your citizenship.
In any other circumstance, or if you must fly from the US to Canada, you need to get a new passport. If you are a US citizen you can get same-day service at a passport agency. Other countries may similarly have expedited or emergency service available.