If you are planning to travel somewhere during the rainy season, then you should keep some things in mind before planning your trip.
If you are going out in the rainy season, then carry a waterproof jacket, raincoat, rain shoes and umbrella with you.
Before the trip, keep all the necessary things like rainwear, extra undergarments, socks, towel, sunscreen, moisturizer etc in your bag.
Do not drink water or eat open food during the rainy season. You can buy packaged items or bottled water.
If you have kids with you on the tour, you must keep a medical kit for the kids, extra clothes and all the things to protect them from the rain ready in advance.