Question

Aerosol cans carry a clear warning of the heating of the can. Why?

Answer 1

A suspension of tiny solid particles or liquid droplets in air or another gas is known as an aerosol. Aerosols can be either natural or man-made. Fog or mist, dust, woodland exudates, and geyser steam are examples of natural aerosols. Particulate air pollution and smoke are examples of anthropogenic aerosols.

Complete answer:
Aerosol spray is a sort of dispensing device that produces a liquid mist in the form of an aerosol mist. It consists of a payload in a container or bottle and a propellant under pressure. The payload is pushed out through a tiny aperture when the container's valve is opened, and emerges as an aerosol or mist. If aerosol cans were simply filled with compressed gas, the pressure would have to be dangerously high, requiring specific pressure vessel construction (as in gas cylinders), or the payload would be tiny and quickly depleted.
Heat warnings are prominently displayed on aerosol cans. Pressure in the can will build as the temperature rises, and ambient temperatures around $120{}^\circ F$ may cause explosions. As a result, aerosol cans should always be stored in dry places away from extreme temperatures. An aerosol can should never be thrown into a fire or left in direct sunlight. It's even vacant. This is due to the fact that the pressure will build up to the point where the can would explode. There are two explanations for this.
The pressure of the gas rises.
More liquefied propellant is converted to gas.

Note:
Aerosol can propellants are generally flammable gas mixtures that have been known to cause fires and explosions. Non-flammable compressed gases, such as nitrogen and nitrous oxide, as well as non-flammable liquid propellants, have been widely used in a variety of aerosol systems, including air fresheners and aerosolized whipped cream.