¿qué no compras en el supermercado cuando hay clima severo?

This Translates to: What do you not buy at the supermarket when there is severe weather?

A good answer might be: No compro juguetes o dulces o jugas cuando hay clima sever.

(You can change the juguetes, dulces and jugas if you desire something else)

This translates to: I do not buy toys, candy or jewelry when there is severe weather.

Hope this helps!