Well... that is certainly not good news at all.
And based on the mini-update I just made on the Philippines, sounds like it is beginning to take off at the normal exponential rate there as well. Again despite heat and humidity.
MERS is also a heat-resistant coronavirus. It hasn't spread enough (not contagious enough) to be useful as a model for how long it takes a heat-resistant coronavirus to burn out, though.
If that's the case, we may just be stuck indoors until we adapt to this new way of doing things, where everyone wears masks and gloves all the time and disinfects, and people are confined indoors once they start nearing their 60s.