Glacier retreat in the mountains will affect water runoff and water provision to metropolitan areas such as Lima, La Paz, Quito and Santiago, which rely on rivers that originate in the high Andes. Lima, the second driest capital city in the world, is vulnerable to drought and heavy rain peak events associated with climate change. In Bogota, lower precipitation levels and a tendency towards increasing extreme events are expected in the coming decades. Hence, the protection of fragile ecosystems such as paramo  will be crucial for supplying water to the city.
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report