This note surveys the statistics of fire casualties classified as having been
'overcome by gas or smoke' in the United Kingdom Fire Statistics for the years
1955-1972 inclusive. For the period covered, the proportion of all annual
casualties suffering from this source of injury (both fatally and non-fatally) has
increased by a factor of about three. Currently, about half the fatal casualties
from all causes in fires per annum are 'overcome by gas or smoke'.
Possible reasons for this increase are discussed and, although the available
statistics do not permit any causal relationships to be established, it is
considered that major factors responsible are likely to have been an increase in
the amounts and, perhaps, the irritancy of gas and smoke generated in fires,
resulting in more persons being trapped. An examination of the proportion of
casualties surviving exposure to smoke and fire gases shows no evidence of a
significant change in the toxicity of fire gases.
