Statistical description of frequency and duration of HWs over 1970–1990 period, and also later during 2000–2020 period for the Brazilian MRs, including median and interquartile intervals.

Trends in the annual HWs number are also presented. Underlined values indicate a non-statistically significant (C.I. 95%) trend based on the Mann-Kendall Trend Test. The MRs are sorted by latitude (decreasing with the distance from the Equator).