Heard on the feed at around 21:09 EST (0209z) that CYYZ tower had been evacuated due to fire/smoke. A few planes which were in the terminal area already were asked to hold (at the marker beacon)
The feed was having a bit of noise issue but if you want to hear it, it is athttp://archive-server.liveatc.net/cyyz/CYYZ-Toronto-Nov-29-2006-0200Z.mp3
When service is back to normal, they begun to clear the backlog in CAT II operations due fog.
P.S. From ATCSCC http://www.fly.faa.gov/adv/adv_otherdis.jsp?advn=6003&adv_date=11292006
"NAV CANADA ADVZY 003 CYYZ/CZY *** TORONTO TWR IMMEDIATE EVACUATION ***
EMERGENCY EVACUATION OF TORONTO CONTROL TOWER -- SMOKE.
ALL AIR TRAFFIC UNITS SHALL IMMEDIATELY GROUND STOP ALL IFR
DEPARTURES INTO OR THROUGH THE TORONTO TOWER."