35c (95 f) is the wet bulb temperature where the human body stops being able to cool itself. Humidity plays a role, but generally above this temperature you’re going to get heat stroke if you can’t find external ways to cool off. So yeah 52c would definitely be enough to be killing people without a/c, fans, cold water, etc.
Go to the mall, find a sunglasses stand. Try on polarized sunglasses until you find something you like under $12 or so.
You’ll find the brand/model number written somewhere on the frame. Google it, and find someplace to buy them by the case.
By a case of 10, put it in your drawer. Bonus points for getting it in another color (I have a set of white frame chunky glasses, but also the exact same model in black for fancy occasions).
Now you have sunglasses you can afford to lose constantly, a backup supply, and a signature look.