Locals should know better but I can give tourists a pass even tho it might kill them.
Many tourists have no concept of what adverse local conditions can actually be or what they mean! They often have no conditions at home
that are anywhere near what they might face here. The real question should be how can they realistically be informed in a cost effective way. If they choose to disregard the warnings at least the effort has been made.

Locals should know better but IMO very basic survival necessities and skills should be taught in schools, perhaps in P.E. class. I'm talking simple stuff like carry water, shelter (adequate clothing for conditions, etc) what to do if you are caught out. etc. real basic no cost simple skills.

For tourists who have no idea/concept of local conditions what can be done that is cost effective. By cost effective I mean what would a rental car company or resort hotel be willing to offer at no cost to guests?
Perhaps a .10c pamphlet listing basic supplies for off of the paved road, put it in there hand, area cell coverage and how to check your provider cell map? Info. on real water needs, how and where to shelter if you get stuck, what to do if out of cell coverage, etc. If tourists are cruising a local area and plan to return perhaps a desk check log book for day plans. If the day book is used and the hotel has luggage in the room but no car in the lot overnite a simple call to the S.O., they check with the rental car Co. to see where the Car GPS is located might save a life and a lot of search expense.
Heck in modern rental cars should they have a panic button attached to the built in GPS System, should all cars that have GPS transponders have that feature?