Steam fog is a type of fog that forms when cold air moves over warmer water. This temperature difference causes water vapor to rise and condense into tiny droplets, creating a foggy appearance. It often occurs in the early morning or late evening when the air is cooler. This phenomenon is commonly seen over lakes, rivers, and oceans, especially during autumn or winter. The warm water releases moisture into the colder air, leading to the formation of fog. Steam fog can create beautiful, mystical landscapes but can also reduce visibility for travelers.