What kind of chemical fuel will spontaneously ignite in hot weather?

Autoignition temperature is a common property of combustible materials. Its content is affected by its volatility and slow oxidation rate in air. Autoignition thermometers for some combustible materials;

Triethylborane. Triethylborane? 20 degrees celsius

Silane 2 1 c

White phosphorus 34 c

Carbon disulfide 90℃

Ether 160℃.

Gasoline (petroleum) 247–280 degrees Celsius

Ethanol ethanol 363 degrees Celsius

Diesel oil 2 10℃.

Butane 405 degrees Celsius

Paper 218–246c

Magnesium 473 c

Methane 537 degrees Celsius

Hydrogen 536 degrees Celsius

It can be seen that common fuels can't spontaneously ignite in high temperature weather. Triethylborane, silane and white phosphorus in this table can spontaneously ignite in air, but they are generally not used as fuels. However, it should be noted that in high temperature weather, various liquids are more likely to volatilize. If the temperature is higher than the flash point, it will catch fire. (Flash point is the lowest temperature at which a certain ignition source is used to evaporate liquid and catch fire under the specified test conditions. Flash combustion is a phenomenon that enough steam is generated on the liquid surface to mix with air to form combustible gas, which will produce a short flame when it meets a fire source and will be extinguished instantly. The lowest temperature of flash point is called flash point. Note that the flash point is the temperature that can be ignited by an electric spark or an open flame, while the auto-ignition temperature is the temperature at which it slowly reacts with oxygen to ignite. Therefore, when storing and using all kinds of fuels in summer, we should pay special attention to avoid direct sunlight, keep good ventilation, stay away from fire sources, prohibit fireworks, and seal containers in time when not in use.