Office of Environmental Health Hazard Assessment (OEHHA) organized human health studies, which found relationships between higher temperatures and adverse health effects such as

• Death and illness
• Hospital visits
• Emergency room visits
• Birth defects.

As a result, the focus was on heat-related effects by restricting our data to the warm season in California over several years. Discussions about the methodological issues in examining the health-related effects due to temperature and air pollution were conducted. 2 types of human health studies were used to conduct the research on the adverse effects of temperature

Studies have helped identify groups who are vulnerable to heat-related effects.

For analysis data was used from public utility records, where we examine variables such as

• daily air pollution levels
• race/ethnicity
• age
• higher education level
• disease type or subgroup
• underlying cause of death
• date of effect occurrence
• Zip code or county of residence.