It is difficult to get accurate information in a war but it seems ISIS is declining and potentially collapsing.
ISIS mass collapsing in east Palmyra as Syrian Army troops advance eastward
Isis’ ‘business model’ failing as group haemorrhages millions while losing territory across Syria and Iraq
ISIS Warns Citizens To Flee Its Capital As Massive Dam Is On The Verge Of Collapse
Syrian regime calls for refugees to 'return home'
There is a "live" map available, the remaining ISIS territories are scattered