As for emergency funds in the bank — find a place that's liquid with easy access. (thedigeratilife.com)
So, they are not a suitable home for emergency funds in case the washing machine breaks down or the roof needs repairs. (moneysupermarket.com)
I would argue to at least have some sort of emergency fund in place before starting to pay off debt aggressively, but after that, go at it! (thebrokeprofessional.com)