Aftermath

Nobody can see 20 feet. After a hurricane, families run portable generators in the garage or too close to the house, and carbon monoxide kills them in their sleep: at least 1,332 US deaths from 2004 to 2021 involved portable generators, most run inside homes or garages (CPSC). The CDC's advice is one sentence, run it outdoors more than 20 feet from doors, windows and vents, but nobody can judge 20 feet in the dark, and the warning often doesn't arrive in their language. Aftermath is a phone web page you talk to, in English, Spanish or Hindi. Stand where the generator is and photograph the nearest door. Meta SAM 3.1 finds the door, and its height in the photo plus the lens's focal length give the distance, judged from the near end of a ±6% error band. The coach says it aloud: "about 10 feet from the door… That's too close." Wide garage doors are held at borderline and asked about, because their outline can read long. - A rulebook in code decides; the model only reads facts. Every piece of advice cites the CDC, CPSC, NIST or Ready.gov word for word, and it never says "safe". - Say "my head hurts" and the 911 line comes back in 0.1 s, before any language model runs. - An unclear answer can add a warning but never clear one. Meta's API once returned nothing for a quick lone "Sí", and MMS garbles a lone "हाँ". Across 240 short-answer transcripts in three languages, none made the coach drop a warning, and 0 of 120 unclear Hindi answers removed one. - It works offline on a nearby laptop (SAM 3.1 on MLX, Muse Glimmer, Meta MMS), because power and cell service fail after storms. With a signal, Muse Spark and Muse Voice Transcribe run through the Meta Model API. - It checks in overnight and writes a relative a plain-English summary of what was measured and what is still unknown. Evidence: six tape-measured photos at 10–30 ft read within +0.2% to +3.1%. Across 31 door views in public laser scans and renders (DIODE, Hypersim), none under 20 ft was rated far enough. Muse Spark read 57 of 62 printed values on 15 real generator rating plates. The Hindi is reviewed by a native speaker. The demo is in Spanish, the most spoken language in US homes after English, with the agencies' own Spanish for every safety line (the app's other Spanish isn't natively reviewed yet). It is not a substitute for a CO alarm or 911.