Heat Related Deaths Summary Tables

Table 1. Heat-related deaths, 2000-2024 (Age-adjusted Rates)

Year of Death	Age-adjusted Rate (per 100,000)	Lower 95% Limit	Upper 95% Limit	Number of deaths
2000	0.14	0.10	0.18	43
2001	0.07	0.04	0.10	22
2002	0.11	0.08	0.15	37
2003	0.14	0.10	0.18	48
2004	0.12	0.09	0.17	43
2005	0.19	0.15	0.24	67
2006	0.59	0.51	0.68	204
2007	0.20	0.15	0.25	71
2008	0.13	0.10	0.17	48
2009	0.16	0.12	0.20	59
2010	0.10	0.07	0.14	40
2011	0.08	0.05	0.11	29
2012	0.15	0.12	0.20	59
2013	0.17	0.13	0.21	66
2014	0.12	0.09	0.16	47
2015	0.13	0.09	0.16	52
2016	0.16	0.12	0.20	66
2017	0.23	0.18	0.28	98
2018	0.22	0.18	0.27	93
2019	0.12	0.08	0.15	49
2020	0.32	0.26	0.38	128
2021	0.33	0.27	0.39	139
2022	0.35	0.30	0.42	150
2023	0.23	0.18	0.28	100
2024	0.40	0.34	0.47	182
Total	0.20	0.19	0.21	1940

Table 2a. Heat-related deaths by race/ethnicity, 2000-2018 (Age-adjusted Rates)

Race	Age-adjusted Rate (per 100,000)	Lower 95% Limit	Upper 95% Limit	Number of deaths
White	0.18	0.17	0.19	643
Black	0.29	0.24	0.35	115
Asian/PI	0.06	0.04	0.08	53
Hispanic	0.17	0.15	0.19	365

Table 2b. Heat-related deaths by race/ethnicity, 2019-2024 (Age-adjusted Rates)

Race	Age-adjusted Rate (per 100,000)	Lower 95% Limit	Upper 95% Limit	Number of deaths
White	0.31	0.28	0.35	367
Black	0.60	0.47	0.74	83
Asian	0.12	0.09	0.16	50
Native Hawaiian/ Pacific Islander	NA	NA	NA	<12
Hispanic	0.26	0.23	0.30	218
Multi-race	0.31	0.14	0.57	12

Table 3. Heat-related deaths by gender, 2000-2024 (Age-adjusted Rates)

Sex	Age-adjusted Rate (per 100,000)	Lower 95% Limit	Upper 95% Limit	Number of deaths
Male	0.30	0.28	0.32	1380
Female	0.11	0.10	0.12	560
Total	0.20	0.19	0.21	1940

Table 4. Heat-related deaths by age group, 2000-2024 (Age-adjusted Rates)

Age	Age-adjusted Rate (per 100,000)	Lower 95% Limit	Upper 95% Limit	Number of deaths
0-4 years	0.09	0.07	0.11	54
5-17 years	0.02	0.01	0.02	29
18-34 years	0.12	0.11	0.14	286
35-64 years	0.25	0.23	0.27	918
65 and over	0.54	0.50	0.58	653
Total	0.20	0.19	0.21	1940

Table 5. Heat-related deaths, 2000-2024 (Crude Rates)

Year of Death	Crude Rate (per 100,000)	Lower 95% Limit	Upper 95% Limit	Number of deaths
2000	0.13	0.09	0.17	43
2001	0.06	0.04	0.10	22
2002	0.11	0.07	0.15	37
2003	0.14	0.10	0.18	48
2004	0.12	0.09	0.16	43
2005	0.19	0.14	0.24	67
2006	0.56	0.49	0.65	204
2007	0.19	0.15	0.25	71
2008	0.13	0.10	0.17	48
2009	0.16	0.12	0.21	59
2010	0.11	0.08	0.15	40
2011	0.08	0.05	0.11	29
2012	0.16	0.12	0.20	59
2013	0.17	0.13	0.22	66
2014	0.12	0.09	0.16	47
2015	0.13	0.10	0.18	52
2016	0.17	0.13	0.21	66
2017	0.25	0.20	0.30	98
2018	0.23	0.19	0.28	93
2019	0.12	0.09	0.16	49
2020	0.32	0.27	0.39	128
2021	0.35	0.30	0.42	139
2022	0.38	0.33	0.45	150
2023	0.26	0.21	0.31	100
2024	0.47	0.40	0.54	182
Total	0.21	0.20	0.22	1940

Table 6a. Heat-related deaths by race/ethnicity, 2000-2018 (Crude Rates)

Race	Crude Rate (per 100,000)	Lower 95% Limit	Upper 95% Limit	Number of deaths
White	0.22	0.20	0.24	643
Black	0.27	0.22	0.33	115
Asian/PI	0.06	0.04	0.08	53
Hispanic	0.14	0.13	0.16	365

Table 6b. Heat-related deaths by race/ethnicity, 2019-2024 (Crude Rates)

Race	Crude Rate (per 100,000)	Lower 95% Limit	Upper 95% Limit	Number of deaths
White	0.44	0.39	0.48	367
Black	0.63	0.50	0.78	83
Asian	0.14	0.11	0.19	50
Native Hawaiian/Pacific Islander	NA	NA	NA	<12
Hispanic	0.23	0.20	0.26	218
Multi-race	0.17	0.09	0.30	12

Table 7. Heat-related deaths by gender, 2000-2024 (Crude Rates)

Sex	Crude Rate (per 100,000)	Lower 95% Limit	Upper 95% Limit	Number of deaths
Male	0.30	0.28	0.31	1380
Female	0.12	0.11	0.13	560
Total	0.21	0.20	0.22	1940

Table 8. Heat-related deaths by age group, 2000-2024 (Crude Rates)

Age	Crude Rate (per 100,000)	Lower 95% Limit	Upper 95% Limit	Number of deaths
0-4 years	0.09	0.07	0.11	54
5-17 years	0.02	0.01	0.02	29
18-34 years	0.12	0.11	0.14	286
35-64 years	0.26	0.24	0.28	918
65 and over	0.53	0.49	0.57	653
Total	0.21	0.20	0.22	1940

Notes about the data

Mortality due to Heat-related illness represents California residents who died due to excessive heat exposure; expressed as a rate per 100,000 California residents. Deaths without a known county of residence are included.
Heat-related deaths were identified for the months of May-September, from 2000 to 2024, using ICD-10 codes for the following as the main or contributing causes of death: heat stroke and sun stroke (T67.0); heat syncope (T67.1); heat cramps (T64.2); heat exhaustion from water depletion(T67.3); heat exhaustion from salt depletion (T67.4); heat exhaustion, unspecified (T67.5); heat fatigue, transient (T67.6); heat edema (T67.7); other specified heat effects (T67.8); unspecified effects of heat and light (T67.9); exposure to excessive natural heat (X30); and exposure to sunlight (X32). As with the morbidity dataset, deaths due to a man-made source of heat (W92) were excluded.
Data Sources: Multiple Causes of Death Files from the Center for Health Statistics, 2000-2019. Denominators for rates are based on estimates from the California Department of Finance.
The 95% Confidence Interval (CI) is the range of values that likely contains the true heat-related event rate per 100,000 in the population.
Data are not available if the number of events is less than 12.
Prior to 2019, data for Asians and Pacific Islanders were combined into a single group (Asian/PI). Beginning in 2019, data were reported separately for Asians and Native Hawaiian Pacific Islanders (NHPI). Data were also reported for Multi-race individuals starting in 2019.