Leopard, solar heaters from soda cans:
Also build small “greenhouse” that can mount on the outside of windows and doors.
I used plexiglass to build a “box” around some windows.
EMP/Power out: When “Desert Shield” became “Desert Storm” one of the first missions was to take out all power stations around Saddam’s anti-aircraft bases. We did this with a special type of Mylar tape. Imbedded with strands of metal. Spooled into a BUNCH of cruise missiles. As the missiles reached their targets the tape would come out slowly. The missile would make circles around the site until all the tape was ejected. The tape fell onto the transformers and power lines. Shorted everything out! Done this way the Allies did not have to rebuild any generation sites or power stations around critical infrastructure needed for the rebuild.