Be carefull with all kinds of fire. Is has already caused lots of damage along the trail. On the picture you can see the monument to a careless trekker which is the burned tree and the plaque next to it says: "This was caused by a cigerette butt".
It's on the way to Cerro Torre, just after leaving El Chalten.
Wind is very heavy in the south of Argentina, all areas east of the Hielos Norte and Sur (the Patagonian ice caps).
Soemtimes, the wind peaks can reach 150 km / hr.
Please be prepared for it, never underestimate it, and when camping, look for a sheltered place to pitch the tent.
The picture was taken in El Chalten, and the people told me, this flag was only like a year old or so (when I took the picture).