Refuges (4)
'refuges' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for arks that I've seen before include "Cupboards in synagogues for law scrolls" , "vessels" .)
(Other definitions for shelters that I've seen before include "Protects against weather or danger" , "Provides protection from weather or harm" , "Covers against the weather" , "Protects or shields" , "Coverings providing protection from the weather" .)