* The party was as disastrous as a hurricane hitting a cardboard house. (This emphasizes the complete destruction and chaos of the event.)
* Her investment plan was as disastrous as a ship hitting an iceberg. (This emphasizes the sudden and irreversible downfall.)
* The meeting went as disastrously as a blindfolded person trying to navigate a minefield. (This emphasizes the danger and unpredictability of the situation.)
* Their attempt to bake a cake was as disastrous as a monkey trying to play the piano. (This emphasizes the incompetence and comical nature of the failure.)
These are just a few examples. You can use your imagination to come up with even more creative similes depending on the specific situation you want to describe.