Apparently the Harvey head they found at the dome is the backup costume:
James Callsen @jamescallsen 4m Just received word that
@SCIMascots has the real Harvey tucked away. The horrific picture was a back up. They'll fix him up new too!
Street Characters @SCIMascots 4h Just heard from Harvey When he got the evac notice he hitailed it out of there in his van. All Ok with him
#abflood #yycflood #calgaryflames