"We deeply regret the loss of tens of lives in the boat accidents in Para and Bahia," two states in the north of the country, President Michel Temer said on Twitter.
Regional authorities in north-central Para state said 21 people were confirmed dead so far after a boat sank on the Xingu river late Tuesday.
That vessel, the Capitan Ribeiro, had 49 people on board, 23 of whom were rescued.
Emergency teams were still searching for five more, the department said in a statement.
Naval commander Flavio Almeida lowered the death toll in that accident from an earlier count of 22.
That boat reportedly had at least 120 people on board. Almeida told AFP at least 21 of them had been rescued by official means, but he added that many more were believed to have been picked up by civilian vessels.
The boat was running the short route from the island of Itaparica across the bay to the city of Salvador, capital of Bahia state, when it went down in a storm.
The naval commander said scores of military personnel were working on rescue efforts at the site.
The state government declared three days of mourning.
"I have been personally following this difficult operation from an early stage and all measures have been taken immediately," said Bahia governor Rui Costa.
In the incident in Para, in a northern Amazon region, survivors told local media that the boat got caught in a rainstorm.
The regional public safety department said 21 people were confirmed to have died in that sinking, including two children.
Rescuers were searching for others missing in the Xingu river.
"It's a hard-to-access area," Colonel Augusto Lima, from the Para firefighters' service, was quoted as saying on Wednesday by the newspaper Folha de Sao Paulo.
The victims who were rescued got out by swimming, Globo news reported, saying the boat went down about 500 meters (1,640 feet) from the riverbank.
Ferries, fishing vessels and big commercial ships ply the Amazon waterways as one of the main forms of transport in a region with relatively few roads.
Disclaimer: No Business Standard Journalist was involved in creation of this content
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
