A system comprising: a first sensor set to determine whether a living being is present in an enclosed space; a second sensor set to determine whether an ambient temperature of the enclosed space is outside a safe temperature range, wherein: the first and second sensor sets comprise passive thermal sensors; and the first and second sensor sets are further to determine absolute temperatures in respective fields of view of the first and second sensor sets; a timing module, communicatively coupled to the first and second sensor sets, to determine: whether the living being has been present in the enclosed space, and the ambient temperature of the enclosed space has been outside the safe temperature range, for a threshold amount of time; and whether a temperature of the living being and the ambient temperature of the enclosed space diverge for a predetermined amount of time; and an alarm module, communicatively coupled to the timing module, to activate an alarm if: the living being has been present in the enclosed space, and the ambient temperature of the enclosed space has been outside the safe temperature range, for the threshold amount of time; and if the temperature of the living being and the ambient temperature of the enclosed space diverge for the predetermined amount of time. a first sensor set to determine whether a living being is present in an enclosed space; a second sensor set to determine whether an ambient temperature of the enclosed space is outside a safe temperature range, wherein: the first and second sensor sets comprise passive thermal sensors; and the first and second sensor sets are further to determine absolute temperatures in respective fields of view of the first and second sensor sets; the first and second sensor sets comprise passive thermal sensors; and the first and second sensor sets are further to determine absolute temperatures in respective fields of view of the first and second sensor sets; a timing module, communicatively coupled to the first and second sensor sets, to determine: whether the living being has been present in the enclosed space, and the ambient temperature of the enclosed space has been outside the safe temperature range, for a threshold amount of time; and whether a temperature of the living being and the ambient temperature of the enclosed space diverge for a predetermined amount of time; and whether the living being has been present in the enclosed space, and the ambient temperature of the enclosed space has been outside the safe temperature range, for a threshold amount of time; and whether a temperature of the living being and the ambient temperature of the enclosed space diverge for a predetermined amount of time; and an alarm module, communicatively coupled to the timing module, to activate an alarm if: the living being has been present in the enclosed space, and the ambient temperature of the enclosed space has been outside the safe temperature range, for the threshold amount of time; and if the temperature of the living being and the ambient temperature of the enclosed space diverge for the predetermined amount of time. the living being has been present in the enclosed space, and the ambient temperature of the enclosed space has been outside the safe temperature range, for the threshold amount of time; and if the temperature of the living being and the ambient temperature of the enclosed space diverge for the predetermined amount of time.