The car probably came from the factory equipped with Honda Genuine Coolant Type 2 (Blue) which has a boiling point of 268 degrees Fahrenheit. I'd be concerned if temps went over 212.
I operate in a similarly arid area, although not quite as extreme and scan gauge usually reports my engine as running between 198-202. 206 is the highest I've seen thus far and that was idling in bumper to bumper traffic.
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