Help! I'll be spending the weekend running around Chicago with some friends (the good news) and the weather is going to be 75 degrees (more good news) with thunderstorms (bad news!!).

So clearly, 75 degrees is too warm for riding boots. Normally I would wear ballet flats or oxfords, but those will not survive a thunderstorm. I have a pair of black patent leather Naot booties that could work. Or do I need to buy a pair of rain boots?

What would you wear?