Core Viewpoint - The article highlights the potential fire hazards posed by glass products, such as empty bottles and mirrors, when exposed to sunlight during the summer months, emphasizing the need for caution in their storage and handling [3][9][17]. Group 1: Incidents of Fire Caused by Glass Products - On June 4, a storage compartment in Beijing caught fire due to sunlight refracting through empty glass bottles, igniting surrounding flammable materials [3]. - A similar incident occurred in Fujian, where sunlight focused through a double-sided mirror ignited a promotional flyer, leading to a fire that destroyed items in the store [5][6]. - In May of the previous year, a backyard fire in Zhejiang was traced back to 80 crystal balls that reflected sunlight, igniting nearby cardboard boxes [8]. Group 2: Other Fire Hazards in High Temperatures - A fire in a vehicle in Beijing was caused by sunlight heating water bottles placed on top of the truck, which ignited surrounding materials [11]. - The structure of common items like bottled water and reading glasses can act as convex lenses, concentrating sunlight and increasing temperatures, which can lead to fires [13]. - Firefighters conducted experiments showing that items like lighters and spray cans can explode when left in a car under direct sunlight, with significant temperature increases observed [15]. Group 3: Safety Recommendations - It is advised to keep items such as magnifying glasses, bottled water, and other glass products away from direct sunlight and flammable materials [17]. - Specific caution is recommended for items like lighters, power banks, and aerosol sprays, which should not be left in vehicles during hot weather [17].

Group 1 - High temperatures in closed car spaces can exceed 80℃, leading to potential explosions and fires from common items like lighters, perfumes, and power banks [1][5] - A simulation by firefighters showed that lighters can explode within 2 minutes at high temperatures due to the expansion of liquid butane [4][5] - Perfume bottles can eject their nozzles after 20 minutes in high heat, as alcohol inside vaporizes and increases pressure [4][6] Group 2 - Items like sunscreen and aerosol sprays can also explode in high temperatures due to increased internal pressure [6] - A magnifying glass can ignite paper within 40 minutes by focusing sunlight, similar to how other round objects can act as lenses [8] - Power banks can reach temperatures of 137℃ after 50 minutes in a hot car, posing risks of swelling and potential fires, especially if they contain substandard batteries [11] Group 3 - Cooling sprays can cause explosive reactions if used improperly near open flames, as demonstrated in a test where a fire ignited after spraying the product in a closed car [13] - Firefighters advise against leaving items like lighters, perfumes, and power banks in cars during summer to prevent accidents [13]