google tells me that it is 2-10% humidity around La Stila- the Atacama Desert-
ESO, European Organisation for Astronomical Research in the Southern Hemisphere
www.eso.org
so unless some one is giving him water, he only had a few days, IMO
www.windows2universe.org
Not seeing a lot of predators
grey fox and scorpions (ouch)
the La Stila site tells visitors that they truck in water every day
and it has a fox picture in one of the sub sites.
ESO is happy to welcome interested visitors at the La Silla Observatory. Guided tours for tourists and the general public are offered every Saturday except during July and August, due to the risk of snowstorms in winter time.
www.eso.org
Q: Since Paranal is such a remote and dry site, how are the essentials provided?
A: Paranal is a very arid and isolated place, where no trace of water can be found, and the closest town is about 100 km away. For this reason, everything needed must be brought in specially. The 60 000 litres of water that are used each day are delivered by truck from Antofagasta, the capital of the region, located some 120 km north.https://www.eso.org/public/about-eso/faq/faq-vlt-paranal/