Skip to main content

Table 2 Estimated excess risk (%) of the 2011 heat wave on mortality and ED visits in Harris County, Texas, by age groups and heat-wave definitions a

From: Impact of the 2011 heat wave on mortality and emergency department visits in Houston, Texas

Health outcomes

Age group (years)

August 2–30, 2011

≥95th percentile

≥97th percentile

≥99th percentile

All-cause mortality

All

0.6 (-5.5, 7.1)b

5.0 (-5.6, 16.9)

6.0 (-8.3, 22.5)

15.8 (-15.6, 59.1)

0 - 6

-35.6 (-61.6, 8.1)

-32.6 (-71.6, 60.2)

-56.6 (-87.0, 45.1)

-91.7 (-99.6, 75.6)

6 -65

3.4 (-7.1, 15.1)

4.7 (-13.1, 26.1)

18.9 (-7.2, 52.2)

49.8 (-12.9, 157.7)

>65

0.1 (-7.0, 7.8)

5.8 (-6.8, 20.1)

1.8 (-14.4, 20.9)

6.3 (-27.1, 54.8)

All-cause ED visits

All

3.6 (0.6, 6.6)

6.2 (0.9, 11.7)

7.1 (0.02, 14.7)

13.3 (-2.4, 31.5)

0 - 6

1.4 (-4.6, 7.7)

3.3 (-7.1, 14.8)

-0.7 (-13.9, 14.6)

8.0 (-20.1, 46.1)

6 -65

2.8 (-0.1, 5.9)

5.1 (0.02, 10.5)

6.7 (-0.3, 14.1)

9.3 (-5.7, 26.7)

>65

8.9 (5.1, 12.8)

13.1 (6.4, 20.3)

16.9 (7.6, 27.0)

40.1 (17.0, 67.8)

  1. aThe 2011 heat wave was defined in four ways: August 2–30, 2011, a period with continuous heat advisories issued by the National Weather Service Houston/Galveston office; and periods of 2 or more consecutive days during August 2011 with daily mean temperature above the 95th, 97th, 99th percentiles of the daily mean temperature distribution in 2011; b95% confidence intervals.