Hi ya’ll, my mom picked me up at the airport in my car and when I got in my car there was a warning sign telling me to shut off engine because it was too hot. She said she had been idling for ~20 minutes and tried using the A/C but it was blowing hot. The light had just turned on so thankfully I think we saved the engine from internal damage. I drove to a nearby gas station and added coolant (it was right at the minimum level) and drove home no problem. My car is a ‘09 Volvo S80 T6 w/ 180k miles… wondering if anyone had any ideas as to what could be the problem! Mechanics are super expensive out here in Seattle so hoping to get some advice before I take my car in. Happy to answer more questions and/or send photos. The alternator & water pump were replaced in the last 40k miles, and no visible leaks! Thanks for the help.