Table 2 Meteorological descriptive data, 2007-2012

Meteorological data, May-September

Average county-wide maximum humidex (°C (°F))

Average county-wide maximum dry bulb temperature (°C (°F))

 Minimum

5.9 (42.6)

7.1 (44.8)

 Median

21.6 (70.9)

19.1 (66.4)

 Maximum

44.7(112.5)

34.6 (94.3)

Meteorological data, full year

Average county-wide maximum humidex (°C (°F))

Heat days ≥ threshold (n (% of total days in study timeframe))

 50th percentile

11.6 (52.8)

860 (93.7 %)

 90th percentile

26.3 (79.3)

221 (24.1 %)

 95th percentile

29.7 (85.5)

110 (12.0 %)

 99th percentile

36.7 (98.1)

23 (2.51 %)

 ALS optimum alert threshold

39.7 (103.5)

8 (0.87 %)

 BLS optimum alert threshold

40.7 (105.3)

5 (0.54 %)