How old are they? If they are 10+ then probably its time, but if they are younger, test them for wet grip, if that's still good then I'd run them.
Temp A tires are good, and if the speed rating is way up there, like H(130mph) or above, they are very robust tires, and not likely to fail suddenly trundling along at 60% or less of their load rating at half their speed rating, with 32 psi in them...
The only tires I have ever had "blow out" were truly terrible looking small boat trailer tires, with 1500lb of logs on them.... Like see the frayed nylon cords in the cracks terrible, and they needed to be like 50psi and were at max load rating... I was young and dumb and they had looked like that for years... Anyways nothing happened at all, just a bang and some flopping of dead tire, and the trailer might have done a small wiggle but it was nothing really. I just slowed down and parked it on the shoulder and put on the near equally bad spare and carried on...
