January 31 in San Antonio history…
The lowest temperature ever in San Antonio is recorded on this day. The mercury plunges to a brutally cold 0 degrees Fahrenheit and the city shivers under a 4.7 inch snowfall.
Just four days after the fatal fire that killed three astronauts during a “plugs out” test of Apollo I, two airmen are killed during a similar test inside a space cabin simulator at Brooks AFB. Like the Apollo I astronauts, the airmen at Brooks were working in a pressurized atmosphere of 100 percent oxygen. A spark caused a flash fire and the airmen were severely burned.