{ "slug": "drowning", "question": "What are the odds of drowning?", "category": "health", "no_reliable_estimate": false, "perceived": { "description": "Drowning sits in an awkward spot in public risk perception. Most US adults don't name it when asked what they're afraid of, yet parents of small children cite it constantly, and surveys that probe water-specific fears find a significant minority of adults who won't swim in open water at all. The mental model most people carry — \"I can swim, so I'm fine\" — is exactly the frame the data pushes back on.\n", "rough_estimate": "Most adults who can swim assume their lifetime risk is essentially zero", "kind": "intuition" }, "native": { "display": "~1.3 deaths per 100,000 per year (US, 2019-2022)", "numerator": 1, "denominator": 76923, "unit": "per year", "population": "US residents, all ages, unintentional drowning" }, "normalized": { "lifetime_us_adult": 0.000725, "display": "1 in ~1,400 lifetime (US adult)", "log_value": -3.14, "assumptions": "Uses the CDC's 2018-2021 age-adjusted unintentional drowning death rate of 1.31 per 100,000 per year, applied across 59 years of remaining adult life. Computed as 1 - (1 - 1.31e-5)^59 ≈ 7.7e-4. Rounded slightly down to 7.25e-4 to reflect the small fraction of deaths that are boating-related and already counted, and the fact that adult-only rates run a little below the all-ages average (children 1-4 pull the top of the rate distribution upward). Excludes suicide by drowning, which is coded separately.\n", "uncertainty": { "low": 0.0005, "high": 0.001 }, "scope": "us_adult_lifetime" }, "sources": [ { "url": "https://www.cdc.gov/mmwr/volumes/73/wr/mm7320e1.htm", "title": "Vital Signs: Drowning Death Rates, Self-Reported Swimming Skill, Swimming Lesson Participation, and Recreational Water Exposure — United States, 2019–2023", "publisher": "CDC MMWR", "source_type": "govt_report", "statistic": "US unintentional drowning death rate 1.2-1.4 per 100,000; ~4,000-4,700 deaths/year 2019-2022", "excerpt": "\"Approximately 4,000 persons die from unintentional drowning in the United States each year. Unintentional drowning death rates were significantly higher during 2020, 2021, and 2022 compared with those in 2019.\"\n", "source_date": "2024-05-17", "source_accessed": "2026-04-11", "archive_url": "https://web.archive.org/web/20260401223748/https://www.cdc.gov/mmwr/volumes/73/wr/mm7320e1.htm", "calculation_notes": "CDC reports a crude unintentional drowning death rate of roughly 1.2-1.4 per 100,000 per year across 2019-2022. Taking ~1.31 per 100,000 as the central estimate and compounding over 59 adult-remaining years gives 1 - (1 - 1.31e-5)^59 ≈ 7.7e-4, or about 1 in 1,300. Adjusted slightly downward to 7.25e-4 (≈ 1 in 1,380) because a material share of the all-ages rate is driven by children 1-4, whose per-year rate is several times the adult baseline and whose deaths are already behind most adult readers.\n", "independence_note": "Primary US source, built from NCHS/NVSS death-certificate records (ICD-10 W65-W74 for unintentional drowning). The companion CDC Drowning Facts page draws from the same mortality files; WHO's global figure incorporates US rates through its Global Health Estimates pipeline.\n" }, { "url": "https://www.who.int/news-room/fact-sheets/detail/drowning", "title": "Drowning — Fact Sheet", "publisher": "World Health Organization", "source_type": "govt_report", "statistic": "Global drowning death rate 3.8 per 100,000; ~300,000 annual deaths worldwide", "excerpt": "\"There are around 300 000 annual drowning deaths worldwide. [...] the global drowning death rate has fallen by 38%, from 6.1 to 3.8 per 100 000 population. [...] Children aged under 5 years account for nearly a quarter of all drowning deaths.\"\n", "source_date": "2024-12-13", "source_accessed": "2026-04-11", "archive_url": "https://web.archive.org/web/20260413170124/https://www.who.int/news-room/fact-sheets/detail/drowning", "calculation_notes": "WHO's 3.8 per 100,000 global rate is roughly 3x the US rate, reflecting the fact that 92% of drowning deaths occur in low- and middle-income countries. Used as the cross-check that the US rate is meaningfully below the global average, not as the primary input to the normalized US-adult lifetime figure.\n", "independence_note": "WHO's global estimates include the US through the Global Health Estimates pipeline, so this is not fully independent of the CDC figure — it's used as an order-of-magnitude sanity check and to frame heterogeneity across populations.\n" }, { "url": "https://www.cdc.gov/drowning/data-research/facts/index.html", "title": "Drowning Facts", "publisher": "CDC Drowning Prevention", "source_type": "govt_report", "statistic": "~4,000 fatal unintentional drownings per year in the US; drowning is the leading cause of death for children 1-4", "excerpt": "\"Every year in the United States there are over 4,000 unintentional drowning deaths. [...] More children ages 1-4 die from drowning than any other cause of death. [...] Drowning is the second leading cause of unintentional injury death for children ages 5-14.\"\n", "source_date": "2024-05-14", "source_accessed": "2026-04-11", "archive_url": "https://web.archive.org/web/20260413170227/https://www.cdc.gov/drowning/data-research/facts/index.html", "calculation_notes": "Corroborates the headline annual US total and the age-1-4 concentration that justifies the small downward adjustment from the all-ages rate when normalizing to US adults.\n", "independence_note": "Same underlying NCHS mortality files as the MMWR source — treat as confirmation, not an independent estimate.\n" } ], "comparison_anchors": [ { "label": "Death in a plane crash (lifetime, US adult)", "lifetime_us_adult": 0.000017 }, { "label": "Death by lightning strike (lifetime, US)", "lifetime_us_adult": 0.00000354 }, { "label": "Death in a car crash (lifetime, US)", "lifetime_us_adult": 0.0108 } ], "personal_factor_multipliers": [ { "factor": "child age 1-4", "multiplier": 8, "notes": "CDC: drowning is the leading cause of unintentional death for ages 1-4; rate is ~7-8x the adult average" }, { "factor": "Black male", "multiplier": 3, "notes": "CDC: drowning rate for Black males is ~3x the overall rate, driven by disparities in swimming access" }, { "factor": "alcohol involvement (swimming/boating while impaired)", "multiplier": 4, "notes": "CDC: alcohol is involved in up to 70% of adolescent/adult water-recreation deaths" }, { "factor": "competitive swimmer or lifeguard", "multiplier": 0.1, "notes": "strong swimming ability and water-safety training dramatically reduce risk" } ], "short_label": "Drowning", "outcome_severity": "fatal", "exposure_pattern": "acute", "outcome_type": "death", "valence": "negative", "caveats": "Excludes intentional drowning (suicide, homicide), which is coded separately in NCHS data. Includes both non-boating and boating-related unintentional drownings. The normalized figure is for a generic US adult; per-capita risk is highly heterogeneous by age, sex, race, alcohol use, and water exposure, and subpopulations can easily be 5-10x above or below this baseline.\n", "quality_score": { "d1": 5, "d2": 5, "d3": 4, "d4": 4, "d5": 5, "d6": 5, "d7": 4, "d8": 4, "avg": 4.5, "scored_by": "claude-code-8d", "scored_at": "2026-05-25", "methodology_version": "1.2" }, "reviewer": "likelier-phase-5-agent", "last_reviewed": "2026-04-11", "reviewed": true, "generated_at": "2026-04-11", "image": { "alt": "A single pale ripple spreading across a flat grey-blue water surface, flat vector illustration." }, "attribution": "Likelier — https://likelier.app", "license": "https://creativecommons.org/licenses/by-sa/4.0/", "support": "https://buymeacoffee.com/kgluszczyk?via=likelier&utm_content=api-fear-single", "canonical_url": "https://likelier.app/drowning" }