The higher peaks of the Park have plenty of fog due to the trade winds of the northeast, that capture humidity as they pass through the Caribbean sea and crash against the SerranĂ­a de Macuira during the night. The stunted vegetation captures the humidity condensed in the fog that floats on the peaks. The northeastern slopes supply most of the sources of water, like springs and streams, which are permanent during rainy season and intermittent during the dry season, while the southwestern side is drier. Most of the water produced in Macuira gets filtered in the sand of the neighboring semi-desert zone and becomes the subterranean source of water used by Wayuu communities, by means of deep wells, for their needs.