Fortunately, not too many bears in areas that regularly hit 120-130.
I think the risk isn't so much the outside (ambient) temperature, but rather the temperature inside the car. As we all have observed, cars parked in the sun act like a greenhouse, and can get much hotter than the outside temperature.
On summer days in interior Alaska the ambient temperature can sometimes get well into the nineties. It would be much hotter inside a car parked in the sun. There are lots of bears in interior Alaska.
There are also bears in Montana, Wyoming, and elswhere. Does it ever get hot in parked cars in those states???