Prius stopped randomly and emergency brake turned on while driving

I was driving yesterday for like 3/4 hours it was weird ,because my AC seemed to stop working that day and it never does stop. So my AC blows hot air all day and suddenly the car stops while driving …emergency brake automatically comes on and a red triangle. Never had a emergency brake come on while driving and a red triangle so that was weird . As dramatic as it sounds I pulled over turned the car off for 30 mins and drove it back home 10 Miles no issues and my AC blows cold all of a sudden again???? I turn it on to drive to autozone and still no issues or anything and now my ac is cold again. Scanned it and only minor codes like Evap leak and (p1121 ( coolant control valve which is a new code ) evap leak I been riding around with some months doesn’t seem to affect anything , and seems totally unrelated to the issue because how does a car turn off and emergency brake automatically come on??? Did the car over heat ? Or ? I’m not sure this is very weird .

 

Sorry, I’m not a car person it wasn’t my e brake but I have no other explanation because as soon as the car had the red triangle and no power . I seen a brake light on the dash and a grinding sound as if the e brake was activated . A loud grinding sound until it was parked … I turned the car off and back on no sounds smooth sailing ?

 

Yes , just fine . No sounds from the car everything is fine . Not sure why or how either.

 

Ok so I just checked and the car is in battery mode and the fluid isn’t moving the gas engine isn’t on at the moment as it’s running on the electric moxie in indle but it’s staying still (the fluid)