Human civilization requires energy to function, which it gets from energy resources such as fossil fuels, nuclear fuel, or renewable energy.
Young enough to enjoy the enthralling treshhold of the transitional era.
Old enough not to worry about getting either washed away or drying out.
I’m no expert, but I believe the transitional era should have started decades earlier and it will come up short, by decades.
I’d suggest... ‘practice the backstroke, fill your canteens & pray’.