I live around the area of San Diego and San Diego county.
Few hospitals have burn centers, even the newer one in the U.S. San Diego has a burn center, there is a large one at the U.S. naval hospital also. Which have been treating the military and war wounded for decades. TJ, Mexico has hospitals, but don't believe a burn center. Plus the Mexican hospitals are pretty well backed up most of the time as a normal thing. But if you have the money to pay for treatment, odds are you can get hospital/medical care.
On another related subject... that CPU and hospitals beds shortage in California, due to covid-19, is the direct results of people coming across the Mexico border, legally or illegally, for treatment. The local hospitals are being overwhelmed by thousands of border crossing non citizen people these last 6 months. U.S. citizens are being forced to wait for treatment or go elsewhere, where ever that may be. There is just not room for them. All pretty much based on a first come, forst bases.
Some even question if there really is a serious CPU and hospital bed shortage after all, in California. Some well connected medical personal will tell you no. Some say it's a MSM hype for whatever reason.