My boy is starting to throw tantrums in public. And shouts at us when we raise our voices at him. What should we do without creating a scene?? It's so trying :(

Set his expectations right even before stepping out of the house. Since he already has an antecedent throwing tantrums in public, make clear to him that it is not allowed. Let him know the consequences of not obeying (no tv, no snacks or whatever) and stick to it. If he decides to throw a tantrum, finish up whatever you're doing and head home without saying anything. I would do the disciplining at home. So either he gets punished in his timeout zone or time for a good talk. I wouldn't raise my voice at him in public. He needs to be respected too. :)