I doubt a pot will do much against the rain. But I won't spoil her fun.

In the city whenever there's a rain and when people don't care to bring an umbrella, which is all the time really, people would grab whatever they can just to keep their head dry. Clothes, that'll dry off but your hair? Now that is priority number one to keep dry.

Plastic bags, cardboard boxes, half broken umbrella gotten out of the trash. It's all good.
Biki here's pot would have work if she just have it over her head and run like hell to the nearest shade.