Blasting the heater even on 90 degree days.  We have to do something about this.  My faithful Miata is overheating even on flat road.  It’s been a bit of a problem the past few months when Kent works her hard in the mountains or heavy traffic but now it is nearly all the time.  Kent cleaned out the radiator fins (we have run on a lot of dirt road and it was a mess) but that didn’t do it.  Now she’s in the hands of the local mechanic.  He says it’s the auxiliary fan not running.  He is replacing it today.  I have my fingers crossed.