- Peppermint hair and body products: When it's incredibly hot outside, the soothing tingle of peppermint will cool you down in a flash, whether it's in your shampoo, bath gel, or body lotion. Making your own peppermint water to spritz when you get overheated is also a great, easy trick.
- Semipermanent eyeliner: Even waterproof eyeliner melts off in the heat, so grab some semipermanent liner instead, like Topshop Semi Permanent liner in Perpetual ($16).
- Stick concealer and powder: If foundation or even tinted moisturizer doesn't seem to be holding up, try an inexpensive no-budge stick concealer, like L'Oréal Infallible Never Fail concealer stick ($10). Top off with finishing powder to set.
- Spin pins or hair elastics: If your hair isn't short, wearing it down is going to leave you sweating, so throw a couple Goody Spin Pins ($7) or ouchless hair elastics in your bag. It's pretty simple, but putting your hair up makes a huge difference.
- Wipes: When it's this hot, things can get smelly almost no matter what you do. Try Dermadoctor Medetate wipes ($48), which are designed to treat hyperhidrosis, aka excessive sweating. If you want something a little less serious, go with Boots No7 Quick Thinking 4-in-1 wipes ($7); they're unscented and do everything from remove makeup to take away odors.