Bubbling noise from coolant reservoir area

What is your question?

It's been really hot lately here in Kansas City. After I got home today and parked in the garage I heard bubbling noise from either the coolabt reservoir or below it where water is coming out from AC. Should I be concerned? Also the temp gauge reads at about 220 degrees while driving in stop and go traffic. Should I get the coolant system inspected or is that normal for hot weather?