Which retail innovation did Walmart specifically develop for hurricane-prone regions after analyzing geographic vulnerability patterns?

Product innovation often reflects the geography and culture where it was developed. Companies frequently design products specifically for regional markets or based on local geography. This trivia question explores how a major retail giant innovated their product offering based on geographic insights and regional customer needs.

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Hurricane-proof shopping carts with GPS trackers
A mobile emergency supply center that can be deployed to disaster zones within hours
Underwater cash registers that function during floods
Solar-powered refrigeration units that maintain cold chain during power outages