Widowed now, the wife wonders what she would save from their old home if it were to catch fire. (Para. 15)
Meaning: As now her husband has died, she wonders what she would save from their old house if it were on fire.
Please notice the subjunctive mood used in the sentence.
save from: keep (something or someone) from (danger, being destroyed, etc.); make
safe from danger or being destroyed
The thing to be happy about is that their wedding album was saved from the fire. 值得庆幸的是，他们的结婚相册没有被大火烧毁。