3D Plots of the effect of precipitation on COVID-19 infection risk across lags and overall plots of the effect of precipitation on COVID-19 infection risk excluding precipitation levels >30 mm daily for each study site.

The surface of 3D plots visualizes the relative risk of COVID-19 infection (y-axis) for different levels of precipitation (x-axis, millimeters) across different lag times (z-axis, days). The overall effect plots provide an estimate of the combined relative risk of COVID-19 across the 14-day lag period with precipitation levels represented on the x-axis and the relative risk on the y-axis.