Core Points - High temperatures in summer can cause car interiors to reach extreme temperatures, often exceeding 70℃, creating hazardous conditions for various items inside the vehicle [1][3] - Incidents of items like cleaning sprays and aromatherapy products exploding in parked cars due to heat have been reported, highlighting the risks associated with leaving such items in vehicles [1][2] - The phenomenon of "lens effect" from certain items, such as bottled water and sunglasses, can lead to ignition and fire hazards within the car [2][4] Group 1 - High temperatures can cause car interiors to become like "mobile ovens," with dashboard temperatures exceeding 80℃ under direct sunlight [3][4] - Items such as lighters and power banks can explode or catch fire when left in hot vehicles, with tests showing significant temperature increases leading to combustion [4][6] - The use of aerosol sprays in cars poses a significant risk, as they can explode when exposed to high temperatures, leading to dangerous situations [5][6] Group 2 - Fire incidents have occurred due to the "convex lens effect" of items like bottled water, which can concentrate sunlight and ignite surrounding materials [2][4] - Recommendations for safely managing vehicle temperatures include using sunshades and ventilating the car before entering, which can lower the internal temperature by 5 to 10℃ [7][8] - Firefighters suggest techniques for quickly cooling down a car after it has been parked in the sun, such as opening windows and using air conditioning effectively [7][8]