In the current study, we analyse the association between shortterm
exposure to individual air pollutants and mortality within six
different weather types and transitional weather, and stratify by
season and the cause of mortality.
Across Canada on a yearly basis, we find the greatest difference
in RR within the hottest weather types of DT and MT (þ11.0
and þ9.0%). Studies relating high temperature days to respiratory
and cardiovascular mortality (D’Ippoliti et al., 2010; Hoffmann et al.,
2008) report a more prominent effect of heat waves on respiratory
causes, with the study in Europe by D’Ippoliti et al. (2010) suggesting
this is due to increased susceptibility among people with