‘Fire’ means visible heat and light caused by ignition or combustion. The mere apprehension of fire is not sufficient. It does not matter what causes the fire, provided that the cause of the fire was fortuitous. Therefore, fire caused by lightning, negligence or even arson (except of course the arson of the assured) will come within the meaning of ‘fire’. (Lightning is also insured under clause 6.1.7 of the Institute Time Clauses – Hulls (1/11/95).)
If the fire arises by reason of the assured’s own misconduct or by inherent vice, then there is no peril insured against.
‘Fire’ also includes the immediate consequences of fire, including damage caused by smoke and the water used in firefighting or rain entering the burnt property. If the ‘fire’ leads to an explosion, then any damage caused by that explosion will be covered. If, however, the fire was caused by an explosion, then that is not a ‘fire’. However, clause 6.1 of the Institute Time Clauses – Hulls (1/11/95) covers loss by ‘fire and explosion’. Accordingly, if there is an explosion, whether coming before or after the fire or occurring without any fire, there will be cover. An explosion involves a violent nuclear or chemical reaction or a violent escape of gas or vapour. A volcanic explosion is within ‘explosion’ (note clause 6.1.7 of the Institute Time Clauses – Hulls).
Depending on the policy, it may be that ‘fire’ will not include loss arising from a fire which had been deliberately lit for an industrial process or for heating, etc. – a so-called ‘friendly fire’. Even in cases of ‘friendly fires’, the recoverability of a claim may turn on whether the subject-matter insured was intended to be affected by the fire.