It is pretty difficult to avoid stepping into puddles, during the rainy season. While it can be fun if you still have that 'little child' hiding inside of you. Most adults just curse their luck, when they step into a puddle. It is best that footwear worn during this season is especially designed for rain. Wear crocs or another kind of monsoon footwear that doesn't stay wet. This is of course for your own safety.
Damp feet, may not give you a cold or flu because these ailments are generally caused by viruses. If your immunity is down, the cold and wet feet will make you more vulnerable to catching viruses.
When your feet get wet in dirty rainwater, you should attempt to wash it, at the earliest in clean running water. Use soap to remove all traces of visible and invisible dirt. Damp feet can cause a fungal infection of the toenails, which are very difficult to get rid of.
Soak your feet in water to which vinegar is added to kill the disease-causing fungus. Ensure that you dry your feet, at the earliest. Do not let them stay wet, for long.
Carry a hand towel for this purpose and always have a pair of shoes in your vehicle and/or office, so you can slip into a dry pair.
"A love affair with knowledge will never end in heartbreak." -Michael Garrett Marino