Wandering around Asia and staying in high-rise and high-star hotels, I keep being told not to use the lifts. On nearly every lift there is a notice 'In case of fire do not use lift'. Does the management really mean that we shouldn't use the lift in case a fire breaks out? This would inconvenience a lot of people in high-rise hotels in high-humidity regions.
What the notice is trying to say is 'When there a fire, don't use the lift'. The insertion of 'the' would solve the problem. 'In the case of fire do not use lift.' OK, it sounds a little clumsy but it is English.