The Amazon rainforest makes much of its own rain

Trees across the Amazon release enormous volumes of water vapour into the air through evapotranspiration, forming vast airborne moisture streams — nicknamed 'flying rivers' — that carry roughly as much water as the Amazon River itself and fall as rain across South America, sometimes as far south as Argentina.

— Standard atmospheric and hydrological research accounts, Flying river — Evapotranspiration and moisture transport studies