Figure 6

Rainfall before and after the extreme heat events. Rainfall averaged over 3 days before (a) extreme dry heat days and (c) extreme humid heat days, and (e) their differences. (b), (d) and (f) are the same as (a), (c) and (e) except for rainfall averaged over the 3 days following the extreme dry and humid heat days. Solid (open) circles in (e) and (f) indicate significant (non-significant) differences at the 95% confidence level using two-sided Student t-test. Rainfall units are in mm/day. (g) and (h) Box plots showing precipitation distribution for all stations with significant negative regression coefficients in Fig. S5a for the 90th percentile extreme heat threshold (g), and in Fig. 3a for the 95th percentile threshold (h), for 3-days before (green marks), same day (blue), and 3-days after (orange) the extreme dry and humid heat event. The maps are made with ArcGIS Pro 2.2.0 with the US base map downloaded from Census Bureau, https://catalog.data.gov/dataset/2019-cartographic-boundary-shapefile-current-census-tract-for-united-states-1-500000.