Figure 11.5 | Housing and socioeconomic disadvantage are correlated with the use of emergency services on hot days (rho = 0.55, p<0.01). The spatial distribution of (A) a community vulnerability index (VI) (PCA) by deciles and (B) ambulance call-outs on days above the daily mean of 34°C, in Brisbane, Australia. Ambulance call-out data are expressed as deciles based on per-capita calls during 2003–2011 (Loughnan et al., 2013)