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City of Santa Ana Emergency Operations Plan <br />Part I Basic Plan <br />2.1.3 Climate <br />Santa Ana's climate is considered to be a steppe or semi -arid climate, with little rainfall throughout the year. The <br />annual season average rainfall between 1908 and 2015 was 12.82 inches, compared to the season maximum for <br />the 1940-1941 period at 32.14 inches'. Santa Ana can also experience multi -year droughts with as little as 2 to 3 <br />inches per year.lo <br />Monthly seasonal average temperatures range from a minimum of 55.3°F to a maximum of 75.0°F in the winter, <br />and a minimum of 68.0°F and a maximum of 81.6°F in the summer. 11 Temperatures sometimes exceed 100 <br />degrees for several days due to summer or fall heat waves or strong Santa Ana wind events. Temperatures <br />infrequently drop close to freezing during some winter nights.12 <br />2.1.4 Population and Demographics <br />Santa Ana has a population of 342,930 residents 13. The City makes up approximately I I% of Orange County's <br />3.18 million people14 and is second only to Anaheim in terms of largest cities by population in Orange County. <br />Santa Ana is also the 1 It' largest city in California 15 and the 57t1i largest city in the United States.16 Santa Ana has <br />a population density of over 12,500 people per square mile, making it one of the densest cities in Orange County17 <br />and one of the most densely populated large cities in the United States. <br />2.1.4.1 Race and Ethnicity <br />The City of Santa Ana is a majority -minority community. 78.6% of the population identifies as Hispanic, most of <br />whom are of Mexican origin. Asians comprise 10.3% of the remaining population. Whites comprise 9.2%, and <br />all others 1.9%. Over 47% of the population is foreign -born, and 82.8% speak a language other than English." <br />RACE AND ETHNICITY <br />White <br />9.2% <br />Hispanic <br />78.6% <br />Asian <br />10.3% <br />All Others <br />1.9% <br />Source: ACS 2010-2014 5-Year Estimates <br />9htlp:Hen.climate-data.org/location/715001/; O.C. Public Facilities & Resources Department, 4/28/2016 (http://www.santa- <br />ana.or /f_ agcts� <br />10 http://ocwatersheds.com/rainrecords/rainfaltdata/historic data <br />11 hLtp:Hen.climate-data.ora/location/715001/; O.C. Public Facilities & Resources Department, 4/28/2016 <br />(http://www.santa-ana.or /fg acts <br />12 For the temperature cites, see the attached Santa Ana Weather History doc. This is a report generated by NOAA from <br />records of the weather station at OCFA Station 75. <br />13 CA DOF 2016 Estimates <br />14 CA DOF 2016 Estimates <br />15 CA DOF 2016 Estimates <br />16 (Cities with populations over 100,000); 2010 Census <br />17 Orange County Progress Report <br />18 2014 ACS 5-Year Estimates <br />15 <br />