Flash floods, landslides and other havoc wrought by torrential rain have killed at least 29 people in recent days in the states of Sao Paulo and Rio de Janeiro while another 25 are missing.
Sydney's dams have seen water levels spike dramatically though many inland areas, that are facing severe water shortages, missed out on the flows.
Interior Minister Eugenio Laborinho says 12 provinces were hit by violent downpour in the early hours of Monday, that came on the heels of a severe regional drought.
Three of the city’s 26 districts were especially hit, causing widespread chaos and damage.
Flash floods have caused widespread destruction in Dien Bien, Yen Bai, Son La, Cao Bang and Lai Chau provinces, leaving 26 people dead, 15 missing and 27 injured.
Rescue operations are continuing to find more than 600 people who are still missing.
In the worst torrential rains in more than a decade, Sri Lanka races to rescue flood victims while nearly 75,000 people have been forced out of their homes.
Indonesia's weather bureau says more heavy rains are likely in Bali. The disaster agency warns people should be aware of the possibility of more landfalls due to the hilly nature of the area.
Several people missing as thousands leave behind houses amid floods in France, Germany, Belgium; French President Francois Hollande declares state of emergency.
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