Edit: this "rain" crap is a digression from the "fire" problem. I don't have experience there, but I imagine "the electric infrastructure and cell towers burnt down" is more of an issue... again, paper and pencil wins.

WRT. paper vs. touchscreens and fire, I imagine two extra factors come into play. One, protective equipment may not play well with touchscreens (are there capacitive screen-friendly pads for gloves that won't burn off?). Two, heat in general. Phones and tablets don't like it all that much, and can easily start behaving weirdly and/or shut down when being used in a car in summer, much less next to an actual fire.