From the aDepartment of Epidemiology, Herbert Wertheim School of Public Health, University of California San Diego, La Jolla, CA

bDepartment of Epidemiology and Biostatistics, San Diego State University, San Diego, CA

cEnvironmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY

dClimate, Atmospheric Science & Physical Oceanography, Scripps Institute of Oceanography, La Jolla, CA.

Submitted April 27, 2021; accepted August 1, 2022

P.S. was supported by NIH grant 1T32AG058529.

The authors report no conflicts of interest.

Supplemental digital content is available through direct URL citations in the HTML and PDF versions of this article (www.epidem.com).

Wildfire perimeters can be obtained from the Fire and Resources Assessment Program of the California Department of Forestry and Fire Protection (CalFire; http://frap.fire.ca.gov/). The spatial extent of the smoke plumes from the wildfires can be retrieved from the Moderate Resolution Imaging Spectroradiometer (MODIS) Rapid Response System (ftp://satepsanone.nesdis.noaa.gov/volcano/FIRE/HMS_ARCHIVE/). Respiratory hospitalization data can be obtained from Office of Statewide Health Planning and Development (OSPHD). Analytic code and sample data to be included in public GitHub upon publication. Analytic code is temporarily included in supplementary material for review.

Correspondence: Paige Sheridan, Department of Family Medicine and Public Health, University of California, San Diego, La Jolla, CA. E-mail: [email protected].