Hot surfaces are areas that have a high temperature, often due to heat sources like stoves, ovens, or heaters. These surfaces can cause burns or injuries if touched, so it's important to be cautious around them. Common examples of hot surfaces include the metal parts of grills and the glass tops of cooktops. Safety measures, such as using oven mitts or keeping a safe distance, can help prevent accidents. Always check the temperature before touching any surface that may be hot.