In parts of Brazil, a dry riverbed doesn't just hurt the environment—it deletes your vote.
April 15, 2026
Original Paper
Climate Barriers to Democratic Participation
SocArXiv · ypgsf_v1
The Takeaway
We usually think of voter suppression as a political tactic involving IDs or polling locations. In river-dependent communities in Brazil, low water levels on election day physically stop people from reaching the polls. The data shows that when river discharge drops, abstention rates skyrocket for the very people most exposed to climate damage. This creates a cruel cycle where those suffering most from environmental shifts are literally silenced by the environment itself. It means the climate isn't just an 'issue' on the ballot; it has become the gatekeeper of the ballot box.
From the abstract
Extreme weather events can undermine political representation by preventing vulnerable populations from voting. Using georeferenced polling-station records from eight Brazilian elections (2010–2024) matched to daily river discharge, we exploit within-polling-station variation to show that historically low river discharge on election day increases voter abstention in communities dependent on river transportation. The effects are larger in polling sections with higher illiteracy rates and married