Warm Weather Cake Care As spring and summer bring warmer temperatures, it’s essential to protect your cake from heat. Direct sunlight can quickly melt many types of icing, so always keep cakes out of the sun. Even if the cake isn’t in direct sunlight, high temperatures can still cause damage. Once you pick up your cake, head straight home—do not leave the cake in your vehicle. A car that’s 70°F or warmer can ruin a cake in just minutes. If you're hosting an outdoor event, keep the cake refrigera