[oil pan 4]

The difference between Costa Rica and an entire north American grid down situation is:
No help will be coming. Costa Rica got help from the US and their neighbors.
Evacuating won't work, same situation everywhere. In Costa Rica people could evac to Nicaragua or Panama.
Costa Rica is tiny, only 5 million people. The US has some cities bigger than that.
Costa Rica is a pretty rough place, these people aren't going to just die with out air conditioning in summer time like some people in western Europe and the United States.
A Carrington event could happen in the middle of winter, most people depend on electricity for home heating, even most propane, natural gas or fuel oil heaters require electrical ignition or forced air.
Plus with out electricity, natural gas infrastructure fails.

The vast majority of people don't have more than a few days worth of water on hand, less than 5 days of food on hand, no way to produce their own power, no way to boil water with out gas or electric.
With out power that 5 days worth of food drops to 1 or 2, maybe 3 when everything in the fridge goes bad and no way to cook anything.

So no food, no clean water for months, what is the only logical outcome to this scenario?
What is going to feed and water all these people?
Divine intervention?