I hope you don't have the notion that global warming means global drying. Warmer ocean temperatures increase rate of water evaporation, which in turn increases rainfall.
Some regions will probably become dryer (just as some regions will probably become colder), but I doubt you've have a rational basis for a belief that Central America in particular is likely to be one of the regions that will become dryer.
Some regions will probably become dryer (just as some regions will probably become colder), but I doubt you've have a rational basis for a belief that Central America in particular is likely to be one of the regions that will become dryer.