In 2003, a major power outage occurred in the midwest and northeast United States affecting some 50 million people. The power outages affected multiple systems in state and local municipalities and, in turn, affected public health.

Semi-structured interviews were conducted using open-ended questionnaires, with a convenience sample of state- and locally selected subject matter experts from Ohio, Michigan, and New York. Respondents were interviewed in groups representing one of five areas of interest, including: (1) emergency preparedness; (2) hospital and emergency medical services; (3) municipal environmental systems; (4) public health surveillance and epidemiology; and (5) psychosocial and behavioral issues. The reported positive and negative impacts of the power outage on public health, medical services, and emergency preparedness and response were documented. Responses were categorized into common themes and recommendations were formulated.

The amount of time that the respondents' locations were without power ranged from <1 hour to 52 hours. Many common themes emerged from the different locations, including communications failures, alternate power source problems, manpower and training issues, and psychosocial concerns. There was minimal morbidity and mortality reported that could be attributed to the event.

Power outages negatively impacted multiple municipal infrastructures, and affected medical services, emergency response, and public health efforts. Previous federal funding positively impacted public health and emergency response capabilities. Recommendations were made based upon the common themes identified by the respondents.

Recommendations may assist state and local health departments, medical service providers, and emergency responders in planning for future power outage problems.

Define the mortality associated with extremely hot weather during the 04 July through 14 July, 1993 heat wave that struck the northeastern United States.

Design — A rapid field assessment was used to compare mortality occurring during the heat wave to mortality occurring during a period in which there was no heat wave using copies of death certificates, The findings of the rapid field assessment were validated, and it was determined whether increases in mortality occurred in other metropolitan east-coast counties also affected by the heat wave, by reviewing computerized mortality files.

Setting — Information was collected on all deaths occurring in Baltimore City, Maryland; Baltimore County, Maryland; Essex County, New Jersey; Newcastle County, Delaware; and Philadelphia County, Pennsylvania; during these specified study periods: 08 – 18 June (comparison period) and 06 – 16 July (heat wave study period), 1993.

Main Outcome Measures — Ratios for total mortality, cause-specific mortality, and variables such as age, sex, race, residence, and day and place of death, that were available fiom death certificates were calculated.

From the rapid field assessment, the following were observed: a 26% increase in total mortality and a 98% increase in cardiovascular mortality associated with the heat wave in Philadelphia. Data from the computerized mortality files showed an increase in total mortality in four of five counties examined and an increase in cardiovascular mortality in all five counties. The risk for death for those dying from cardiovascular disease increased significantly for people older than 64 years, for both sexes, and all races.

As initially indicated by the Philadelphia Medical Examiner, there was excess mortality associated with a heat wave in Philadelphia. All other nearby counties examined also experienced excess mortality associated with the heat wave, although this excess was not recognized by the local health officials. The true impact of a heat wave that causes excess preventable mortality must be appropriately and rapidly ascertained. Using a national standard to certify a death as heat-related will provide the needed information rapidly so that public health resources can be more effectively allocated and mobilized to prevent further heat-related illnesses and death.