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Disclaimer: I am not a meteorologist.
But I live in Malaga, and my take is that you don't need to worry about it. Andalucia gets very little rain; so when a storm comes through, it feels like the apocalypse. But all that rainwater runs off...
The KML or GPX files can be used in a smartphone (in apps like Maps.me) or any other navigation device like Garmin.
How? Here can find a manual for smartphones.
The PDF file you can download into your smartphone or you can print it out.
This...
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