Place sunshades on your windshield and rear window to block direct sunlight.
Consider professional window tinting (As per rules) to reduce heat and UV rays entering your car.
Whenever possible, park your car in a shaded area or use a car cover to protect it from direct sunlight.
Leave windows slightly open to allow hot air to escape, but ensure it's secure against theft.
Use light-colored seat covers to reduce heat absorption and keep seats cooler.
Ensure your air conditioning system is in top condition. If it isn't, get it serviced for optimal performance.
These tips can help maintain a cool temperature inside your car cabin.