Arab tourists enjoy some snow on top of Kitzsteinhorn mountain near Zell am See, Austria, August 30, 2016. Picture taken August 30, 2016. REUTERS/Leonhard Foeger - RTSNPIL

Arab tourists walk towards Mooserboden water reservoir near Zell am See, Austria, August 31, 2016. Picture taken August 31, 2016. REUTERS/Leonhard Foeger - RTSNPHV

Arab tourists stand on top of Kitzsteinhorn mountain near Zell am See, Austria, August 30, 2016. Picture taken August 30, 2016. REUTERS/Leonhard Foeger - RTSNPIK

An Arab tourist looks down from Kitzsteinhorn mountain near Zell am See, Austria, August 30, 2016. Picture taken August 30, 2016. REUTERS/Leonhard Foeger - RTSNPHS

Arab tourists enjoy some snow on top of Kitzsteinhorn mountain near Zell am See, Austria, August 30, 2016. Picture taken August 30, 2016. REUTERS/Leonhard Foeger - RTSNPIH

Arab tourists walk on the dam of Mooserboden water reservoir near Zell am See, Austria, August 31, 2016. Picture taken August 31, 2016. REUTERS/Leonhard Foeger - RTSNPID

Arab tourists walk past a souvenir shop in Zell am See, Austria, August 31, 2016. Picture taken August 31, 2016. REUTERS/Leonhard Foeger - RTSNPHU

Arab tourists enjoy some snow on top of Kitzsteinhorn mountain near Zell am See, Austria, August 30, 2016. Picture taken August 30, 2016. REUTERS/Leonhard Foeger - RTSNPIE

Arab tourists enjoy a boat ride on the lake in Zell am See, Austria, August 31, 2016. Picture taken August 31, 2016. REUTERS/Leonhard Foeger - RTSNPHR

An Arab tourist takes a picture on top of Kitzsteinhorn mountain near Zell am See, Austria, August 30, 2016. Picture taken August 30, 2016. REUTERS/Leonhard Foeger - RTSNPIG

Arab tourists enjoy some snow on top of Kitzsteinhorn mountain near Zell am See, Austria, August 30, 2016. Picture taken August 30, 2016. REUTERS/Leonhard Foeger TPX IMAGES OF THE DAY - RTSNPS9

Arab tourists enjoy some snow on top of Kitzsteinhorn mountain near Zell am See, Austria, August 30, 2016. Picture taken August 30, 2016. REUTERS/Leonhard Foeger - RTSNPIJ

A sign, indicating a closed ski slope, is seen on top of Kitzsteinhorn mountain near Zell am See, Austria, August 30, 2016. Picture taken August 30, 2016. REUTERS/Leonhard Foeger - RTSNPIM