Increased Temperatures Are Associated with Increased Utilization of Emergency Medical Services in Rhode Island.

Background Increasing temperatures negatively impact health and increases demands on healthcare systems. However, this has been poorly studied in Rhode Island (RI). Here we characterize the impact of heat on emergency medical services (EMS) utilization in RI. Methods The Rhode Island National Emergency Services Information System V3 dataset was merged with data from the National Center for Environmental Information of the National Oceanic and Atmospheric Administration from the summers of 2018 and 2019. The outcome of daily mean EMS runs were compared against the exposure increasing daily temperatures, measured as daily maximum, minimum and daily average °F, using Poisson regressions. Patient characteristics were included across temperature models. Results Increasing daily temperatures were associated with increasing EMS encounters. The adjusted incident rate ratio (IRR) for mean daily EMS encounters by increasing maximum daily temperature was 1.006 (95% CI 1.004-1.007, Table 3). This resulted in a projected 17.2% increase in EMS runs on days with a maximum temperature of 65°F compared to days with a maximum temperature of 95°F. The adjusted IRR for mean daily EMS encounters by the daily minimum temperature was 1.004 (1.003-1.006) and the adjusted IRR for the mean daily EMS encounters by the daily average temperature was 1.006 (1.005-1.008). Conclusions Increasing minimum, maximum, and average daily temperatures were associated with increasing EMS utilization across Rhode Island in the summers of 2018 and 2019. Further research into these trends may help with planning and resource allocation as summer temperatures continue to rise.