If the ambient temperature is 40 degrees Celsius and your body temperature is 37 degrees Celsius, there will be a heat transfer between your body and the surrounding environment. In this case, your body temperature will likely increase.
Heat transfer occurs from areas of higher temperature to areas of lower temperature until thermal equilibrium is reached. Since the ambient temperature is higher than your body temperature, heat will flow from the environment to your body. This can result in an increase in your body temperature.
However, the exact change in body temperature will depend on various factors, including the rate of heat transfer, the duration of exposure, and the body's ability to dissipate heat. The human body has mechanisms to regulate its temperature, such as sweating and adjusting blood flow to the skin. These mechanisms help in maintaining a relatively stable internal temperature despite changes in the external environment.
If the heat transfer continues for an extended period or if the ambient temperature is excessively high, it can lead to overheating and potentially heat-related health issues. It's important to be aware of your body's response to the environment and take appropriate measures to stay cool and hydrated in high-temperature conditions.