We're having a heat wave, a tropical heat wave! And have we got the makeup for you (bottom, from left): 1. MAC To the Beach eyeshadow in Sand and Sun. 2. A light peach ($14.50), creamy lipstick in Funbathing. 3. A sheer plum ($14), silky highlighting powder in Marine Life ($26), 4. (top) Very wearable powder blush in Get-away Bronze ($18.50; MacCosmetics.com).