Seal up tight and keep your body heat in... it's a lot cooler than the 122* outside.
Learn from the nomads and wear thin layers to keep the hot outside layer from heating up your insides.
I've ridden a lot in the desert regions of CA but 115* is about where that seems to cap at although I did do 119* once.
It's contrary to what you'd think but wrapped up in leather I was hot but not dying. In my mesh I get delirious even with hydration. Convection is a bitch.
2007 BMW GS Adventure
2000 Ducati 900ss
2010 Harley Ultra Limited
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