To limit the probability that an increase in the ambient temperature will lead to the thermal expansion of liquid, which could lead to the escape of liquid, which could lead to the ignition of vapour from a nearby ignition source, which could lead to harm to persons.
To limit the probability that an increase in the ambient temperature will lead to the thermal expansion of liquid, which could lead to the release of vapour, which could lead to the ignition of the vapour from a nearby ignition source, which could lead to harm to persons.