The last two times I parked my Camry Hybrid at the airport for a week in hot July/August weather, when I returned, the car was filled with noxious fumes which caused my eyes and lungs to burn. The only source I can logically come up with are the hybrid batteries, which vent into the passenger compartment. Please don't say leave the windows open or cracked, not while the car is parked for a week at the airport.