BISMARCK, N.D. (AP) — The North Dakota Game and Fish Department says anglers have until March 15 to remove permanent fish houses from all waters, as well as from state wildlife management areas and federal refuge land.

Fish houses may still be used after March 15 if they are removed daily. However, officials are warning that mild weather conditions can quickly result in unstable ice conditions.

Officials say ice conditions can vary from region to region, between lakes in the same region, and even on the same lake.