Brazil's government pledged 14 million (m) US dollars for relief efforts in the Amazon River basin, an area ravaged by the worst drought in decades.
Whilst thousands of families in the riverside communities are waiting for aid, the drought has also meant an ecological disaster with over 600 tons of fish already eradicated.
A decline in rainfall since January has lowered the main trunk of the Amazon river by some two metres ( 6.6 feet ) from its average water depth of 17 metres ( 55.8 feet ).
In the lake near the village of Lago dos Reis the dramatic reduction in the water levels has created a carpet of dead fish.
Authorities have expressed deep concern about dead fish and rotting river grass which will make the water undrinkable once waters begin to rise.
Brazil's government sent 18 tons of water purification tablets and 100 thousand basic food baskets to help the 167 thousand people affected by the drought.
Military transport planes and helicopters have been busy distributing food and medical supplies to 28 of the state's 61 municipalities since last Saturday, when Amazon State Governor Eduardo Braga declared the state of emergency.
Many tributaries have dried out almost entirely in a region where waterways often provide the only means of transport.