You do not need to get concerned as long as those 2 electric motors are not exposed to those temperatures frequently.
But now is the middle of summer and each day is going hotter and hotter. I'm afraid of getting burnt MGs
The Prius C uses flat wire motor windings which are more robust and reliable than the previous ones. As long as you do not drive uphill for an extended period of time at high speeds the electric motors will not get hot enough.
