How will Zihuatanejo be affected.

Cartels in that area are battling for control. No way to predict the future. As long as the USA has an appetite for drugs, the supply will be there at other’s expense.

The cartels exist creating chaos because apparently that's what the U.S. government wants. There's no other excuse for the over half-century old "war on drugs" aka Prohibition 2.0 failed policy's continued existence. Most fentanyl deaths are because a recreational substance of choice must be bought from criminals in dubious quantity and quality instead of pre-measured doses with known strengths. Then the cartels of course expand into other lucrative businesses including prostitution, human smuggling and protection rackets, thanks to the endless supply of arms they have access to in the States.

"Arms from the States" Looks like the same weapons the Mexican Army and Navy has. Maybe direct back door sales!!