Every school in our county has an emergency response plan that covers pretty much any potential situation from fire, planes crashing into bldgs, WMDs, active shooters and even nuclear accidents. Each school has the same outline for their plan. Once the outline is laid out, then each plan is customized for each school system. For example: layouts of buildings, who is responding from where, how long it will take, etc. This way if their is ever a need for the plan, each responding group will know exactly where to look for pertinent info on just about anything. Saves time and confusion. I can imagine going to a school for a fire and the section for where to shut off electrical power is buried in some obscure bldg description section. So yes, each camp should have a plan that is customized to them, but also follows a standard layout and format, much like an MSDS sheet.
Texas is so large that it is quite possible a big catastrophe can strike and the rest of the state can muster what it needs to deal with the response. To what effectiveness I can't guess. But smaller states can get hit and the whole state is now limping along and needs neighbors to come help in times of needs. That state's emergency reserves could have been wiped out or made inaccessible, while their neighbors can get to their own supply, leaving the challenge of transporting it to the areas of need as the biggest impediment. Every town has a fire/EMS department, even the really small ones. And they can handle the day to day, but they can't handle the big ones alone. That is where the idea of other states stepping up through FEMA makes sense. How many Texas firefighters went to California the last go around of wildfires? Hell, we even had Mexico come in and help us in Kerrville and they aren't even a state.
WIthout FEMA the smaller and less populated states are at real risk, especially with extreme weather becoming the norm instead of the outlier.