Due to illegal logging in the area, deforestation has caused the river to flood in the rainy season. Since 2000, about 100 families have been affected by the overflowing of the river in villages like Aleseca and Lopez Portillo. In addition to the floods, the existing pollution in the water has caused cases of cholera and salmonella in some of the houses closest to river. Since 1995, the city government has taken action to reduce the flooding of the river. It has built barriers and dikes.