Water levels in the main tributaries of the Amazon River have fallen to record lows as drought worsens across Brazil. Some central areas of the country have had no rain for more than 150 days.

The level of the Negro River hit 12.66 meters on Friday in Manaus, in the northwestern Brazilian state of Amazonas. That is the lowest since monitoring began in 1902.

Footage filmed by Reuters news agency shows another tributary near Manaus drying up, with riverbeds exposed in wide areas. People are seen walking on the dry ground.

Many supplies are transported by river in this region, but declining water levels have disrupted shipping operations. This is affecting the lives of people in remote villages as well as the tourism industry.

Brazilian authorities suggest water levels may drop even further. Since the country has also experienced a series of forest fires, concerns are growing about the impact on coffee and other agricultural products.