Carnival Opens in Brazil: Pictures

Rio Carnival 2017 Gremio Recreativo School of Samba Estacio de Sa in Rio de Janeiro, Brazil. Gilson Borba/NurPhoto
Recreation Guild School of Samba Unidos de Viradouro Carnival in Rio. Gilson Borba/NurPhoto
A reveller parades for the Aguia de Ouro samba school during carnival in Sao Paulo. REUTERS/Paulo Whitaker
Revelers wearing costumes depicting "The Simpsons" comic characters during the "Ceu na Terra", or Heaven on Earth, street party in Rio. AP Photo/Leo Correa
Carnival King Momo, Fabio Damiao dos Santos Antunes, holds up the key to the city marking the official start of Carnival in Rio. AP Photo/Mauro Pimentel
Recruiter Guild Samba School Alegria da Zona Sul Carnival in Rio. Gilson Borba/NurPhoto
Revellers parade for the Aguia de Ouro samba school during carnival in Sao Paulo. REUTERS/Paulo Whitaker
"Shiva" and "Suki" during the "Blocao" dog carnival parade in Rio. AP Photo/Silvia Izquierdo
A reveller takes part in an annual block party known as "Ceu na Terra" in Rio. REUTERS/Ricardo Moraes
Revellers parade for the Tom Maior samba school during carnival in Sao Paulo. REUTERS/Paulo Whitaker
Revellers parade for the Aguia de Ouro samba school in Sao Paulo. REUTERS/Paulo Whitaker
Revellers take part in an annual block party known as "Ceu na Terra" (Heaven on Earth) in Rio. REUTERS/Ricardo Moraes
Revellers parade for the Aguia de Ouro samba school in Sao Paulo. REUTERS/Paulo Whitaker
Fireworks are launched above the Pavao-Pavaozinho favela on the first official day of carnival in Rio. Mario Tama/Getty Images
Rio Carnival 2017 Gremio Recreativo School of Samba Estacio de Sa in Rio. Gilson Borba/NurPhoto
A reveller parades for the Aguia de Ouro samba school during carnival in Sao Paulo. REUTERS/Paulo Whitaker
Revellers parade for the Aguia de Ouro samba school during carnival in Sao Paulo. REUTERS/Paulo Whitaker
Rio Carnival 2017 Gremio Recreativo School of Samba Estacio de Sa in Rio. Gilson Borba/NurPhoto
Rio Carnival 2017 Gremio Recreativo School of Samba Estacio de Sa in Rio. Gilson Borba/NurPhoto
A reveller parades for the Aguia de Ouro samba school during carnival in Sao Paulo. REUTERS/Paulo Whitaker
Dogs take part in the "Blocao", or dog carnival parade, in Rio. REUTERS/Sergio Moraes
Rio Carnival 2017 Gremio Recreativo School of Samba Estacio de Sa in Rio. Gilson Borba/NurPhoto
A dog takes part in the "Blocao" parade during festivities in Rio. REUTERS/Sergio Moraes
Rio Carnival 2017 Gremio Recreativo School of Samba Estacio de Sa in Rio. Gilson Borba/NurPhoto
Dogs take part in the "Blocao" during carnival festivities in Rio. REUTERS/Sergio Moraes
Recruiter Guild School of Samba Empire of Tijuca Rio Carnival 2017 in Rio. Gilson Borba/NurPhoto
Revellers take part in an annual block party known as "Ceu na Terra" (Heaven on Earth) in Rio. REUTERS/Ricardo Moraes
Rio Carnival 2017 Gremio Recreativo School of Samba Estacio de Sa in Rio. Gilson Borba/NurPhoto
Recreation Guild School of Samba Unidos de Viradouro Carnival Rio 2017 in Rio. Gilson Borba/NurPhoto