The US government spends over $100 billion on SNAP programs every year; the largest single food welfare project in the world.  It's difficult to predict what an end to SNAP might look like. 

One can assume the worst and be ready for a "Walking Dead" disaster in which angry mobs run rampant.  Or, tensions might continue to simmer.  Many people might be forced to simply get a job, and the welfare subset could decide to adapt.  But they probably won't.

Food banks offer short term relief, though, these programs can be easily overwhelmed in the event of a broad cancellation of EBT.  

In 2025 around 42 million people have tapped into federal SNAP benefits, which amounts to 12% of the population.  More than enough people to create chaos should they be politically weaponized to do so.  But what are the chances of food stamps actually being canceled? 

The longest federal shutdown in history occurred in 2018-2019.  It lasted 35 days and food stamps continued to remain available through the duration of the political standoff.  That said, around half of the staff of the USDA was on furlough which led to delays in new applications and renewals.  A shutdown would have to run for a substantial length of time beyond the record for SNAP benefits to completely vanish, right?

It really depends on Democrats.  A number of economists are warning that the nation's largest "anti-hunger program" has a contingency fund of about $6 billion, but November benefits are expected to total around $8 billion. The USDA's shutdown plan noted that funding is available in the event of a lapse, but if the current conditions hold, SNAP would ostensibly run out of cash in early November. 

At this time, the government shutdown has lasted 18 days, well below the record.  However, conditions for an extended shutdown have never been so numerous and the nation is quickly heading into the holiday season when the effects will be keenly felt. 

The Trump Administration is facing a rabidly hostile Democratic Party with no intention of compromise.  The Senate requires several of these Democrats to vote in favor of a funding package in order to secure a 60 member majority in tandem with Republicans, and this prospect is growing unlikely.  Keep in mind, Democrats have voted against temporary funding measures seven times.