Be sure to protect yourself from the sun when you go out. You can buy some sunscreen and apply it 20 minutes before going out. You can also buy some tools such as umbrellas or sun hats. Be sure to drink plenty of water and try to avoid going out in the afternoon when the sun is hottest.
The weather is hot, so you can eat some sour food properly, which will be of great help to loss of appetite. Don't eat too much stimulating food such as ice cream, which is very harmful to the stomach.