The Per-State Deadliest US Weather Event 2020-2025: 8 States Had No Single Event Kill More Than 1 Person, While Hawaii's Lahaina Fire Killed 102

USE CASE. State emergency management coordinators, FEMA regional offices, and academic disaster historians need a per-state single-event deadliest baseline for 2020-2025 to anchor seasonal preparedness reviews and to identify states where the recent record under-represents long-run climatological risk. The conventional NWS climate report aggregates by national CONUS averages or by state-month means; the per-state single-event-deadliest framing surfaces the 'most consequential single day' in each state's recent record. RESULT. 61 US jurisdictions (states + territories + marine zones) had at least one direct-death severe weather event in 2020-2025. Top 10 by single-event deaths: Hawaii 102 (Aug 8 2023 Lahaina wildfire), Arizona 94 (Jul 11 2023 Phoenix heat dome), Oregon 93 (Jun 26 2021 Pacific Northwest heat dome), Texas 61 (Jul 4 2025 Hill Country flash flood), Florida 60 (Sep 28 2022 Hurricane Ian), New York 32 (Dec 23 2022 Buffalo blizzard), Kentucky 24 (Dec 10 2021 Mayfield tornado outbreak), Tennessee 19 (Mar 3 2020 Nashville tornado), Gulf of Mexico 18 (Sep 27 2022 Hurricane Ian marine), California 17 (Jan 7 2025 wildfire). The top 5 states alone account for 410 deaths = 56% of the 727 total deaths in the per-state single-event-per-jurisdiction ledger. STRUCTURAL TAIL FINDING. At the bottom of the per-state ranking, 8 states had NO single weather event kill more than 1 person in the entire 5-year window: Virginia (Hail 1 death Apr 7 2020), Maryland (Tropical Storm 1 death Aug 4 2020), New Hampshire (Tropical Storm 1 death Aug 4 2020), Massachusetts (Thunderstorm Wind 1 death Oct 7 2020), Vermont (Cold/Wind Chill 1 death Jan 8 2021), Wyoming (Avalanche 1 death Feb 18 2021), Nebraska (Wildfire 1 death Apr 22 2022), Delaware (Tornado 1 death Apr 1 2023). These 8 states' deadliest single weather events of the entire 2020-2025 period were each one-fatality incidents — typically lightning strikes, isolated tornadoes, or single-vehicle hazards. The structural reading is that these 8 states experienced an unusually quiet 5-year window for mass-casualty weather. None of them are climatologically immune from mass-fatality events: Massachusetts has had multiple Atlantic hurricanes with 10+ deaths historically; Maryland has tornadoes; New Hampshire and Vermont have winter storms and floods; Virginia has Atlantic hurricanes and tornadoes; Wyoming has avalanches and winter storms. Their absence of any 2+ fatality event in 2020-2025 is regression-to-mean tail behavior, not a structural climate change. CAVEATS. (1) Storm Events 'direct death' counts depend on local NWS WFO filing practice — see iter 89 for the per-WFO heterogeneity issue. The 8-state list may include states whose WFOs systematically under-file mass-fatality events (versus cases where the events truly didn't happen). (2) 'Single event' here means one Storm Events row; multi-state events (Hurricane Ian, Winter Storm Uri) are counted as separate rows per state. (3) The 2025 Texas Hill Country flash flood is the most recent mass-fatality event in the dataset, dated July 4, 2025. (4) The 727 total in the per-state-deadliest ledger is a small fraction of total US weather mortality 2020-2025 (CDC NCHS estimates several thousand weather-related deaths over the period); the per-state ledger only captures the SINGLE deadliest event per state, not the cumulative.

The federal Storm Events database lists every severe weather event in the US that caused damage or deaths. I went through 2020-2025 and asked: in each US state, what was the single deadliest weather event of the period? At the top of the list, the deadliest single events are well-known disasters: the Lahaina, Hawaii wildfire of August 2023 (102 deaths), the Phoenix heat dome of July 2023 (94), the Pacific Northwest heat dome of June 2021 in Oregon (93), the Texas Hill Country flash flood of July 4, 2025 (61), and Hurricane Ian in Florida (60 in the Florida row, plus 18 more in the offshore Gulf of Mexico marine zone). The top 5 states account for 410 of the 727 total deaths in this per-state ledger — over half. What's interesting is the BOTTOM of the per-state ranking. Eight US states had no single weather event kill more than ONE person in the entire five-year window: Massachusetts, New Hampshire, Vermont, Maryland, Virginia, Wyoming, Nebraska, and Delaware. In each of these states, the worst severe weather event of the 2020-2025 period was a one-fatality incident — typically a lightning strike, an isolated tornado, or a single-vehicle hazard. This doesn't mean these states are immune from mass-casualty weather. Massachusetts has been hit by multiple Atlantic hurricanes with double-digit death tolls historically. Maryland and Virginia get tornadoes regularly. New Hampshire and Vermont have winter storms and floods. Wyoming has avalanches. Delaware is on the Atlantic coast with hurricane exposure. The absence of any 2+ fatality weather event in 2020-2025 in these eight states is regression-to-mean tail behavior — they had a quiet 5 years, statistically — not evidence of climate change reducing their hazard. Why this matters: state emergency management coordinators in these 8 states should treat the recent quiet period as overdue tail risk, not as a new planning baseline. The next mass-casualty weather event in any of these states will be an apparent 'shock' relative to the 2020-2025 record but is fully consistent with longer-run climatology. The Texas Hill Country flash flood on July 4, 2025 (61 deaths) is the most recent reminder of how quickly a state can move from 'no recent mass-casualty weather' to '4th-deadliest single event in the country in 5 years'.

Hawaii 102 (Aug 8 2023 Lahaina wildfire) · Arizona 94 (Jul 11 2023 Phoenix heat dome) · Oregon 93 (Jun 26 2021 PNW heat dome) · Texas 61 (Jul 4 2025 Hill Country flash flood) · Florida 60 (Sep 28 2022 Hurricane Ian) · New York 32 (Dec 23 2022 Buffalo blizzard) · Kentucky 24 (Dec 10 2021 Mayfield tornado) · Tennessee 19 (Mar 3 2020 Nashville tornado) · Gulf of Mexico marine 18 (Hurricane Ian) · California 17 (Jan 7 2025 wildfire)

Massachusetts 1 (Thunderstorm Wind Oct 7 2020) · New Hampshire 1 (Tropical Storm Aug 4 2020) · Vermont 1 (Cold/Wind Chill Jan 8 2021) · Maryland 1 (Tropical Storm Aug 4 2020) · Virginia 1 (Hail Apr 7 2020) · Wyoming 1 (Avalanche Feb 18 2021) · Nebraska 1 (Wildfire Apr 22 2022) · Delaware 1 (Tornado Apr 1 2023)

61 US jurisdictions with at least one direct-death event · 727 total deaths in the per-state-deadliest ledger · top 5 states (HI/AZ/OR/TX/FL) account for 410 deaths = 56% of total · top 10 states account for 510 deaths = 70% · 8 states had no 2+ fatality event in the entire 5-year period · 2025 Texas Hill Country flash flood (61 deaths) is the most recent mass-fatality entry