Why climb into weather
As posted earlier fire drills must be initiated immediately (not after 40-60 sec). However, it may take time to confirm that the fire is extinguished. 3/4 mile vis would allow circling the rig at low level (with the benefit of a quick emergency landing on water, with emergency asset close by, if the fire continues). If the fire is out, circling the rig would also permit burning!!!!!!!!!!!! down fuel prior to landing.