The contiguous U.S. has warmed about 1.6 °F since the early record — but no honest disaster comparison reaches back to 1800
Asked:
“map historical change in climate versus number of natural disasters reported in the united states from 1800 to 2026”
This report layers what the official record actually holds. NOAA’s contiguous-U.S. annual temperature series begins in 1895 (complete through 2025; 1901–2000 average 52.01 °F). A secondary station-network anomaly sequence runs 1869–2026 (158 annual values, °F departure; 2026 year-to-date). EM-DAT’s reported-disaster record begins in 1900 and 2026 is partial. The years 1800–1894 have no comparable nationwide annual temperature series, 1800–1899 no EM-DAT series — those spans are shown as gaps, not invented lines.
One timeline, 1800–2026: coverage above, temperature where it exists, disasters unresolved
warmer than 20th-century-style baseline
cooler than baseline
hatched: no defensible data / partial year
What can and cannot be concluded
Can be concluded
- The contiguous U.S. has warmed substantially: the 30 most recent complete years (1996–2025) average about 1.6 °F warmer than the first 30 years of the anomaly record (1895–1924).
- Official annual national temperature coverage exists continuously from 1895 through 2025 (NOAA Climate at a Glance, nClimDiv).
- A record-level EM-DAT workbook covering 1900–2025 with ISO country and DisNo. event IDs exists, so a U.S.-only annual disaster count is derivable — from that file, not from these rows.
Cannot be concluded
- No annual U.S. disaster-count line is drawn here: the supplied rows contain no parsed U.S.-only EM-DAT table, and inventing one would be fabrication.
- A rise in reported disaster counts is not by itself evidence of warming: EM-DAT/Our World in Data warn that much of the historical increase reflects improved reporting.
- Counts mix climatic, meteorological, hydrological and geophysical hazards; earthquakes and volcanoes should be separated before any climate attribution. Correlation would not establish causation.
- Nothing about 1800–1894 temperatures or 1800–1899 disasters nationwide, and no full-year 2026 comparison — both series are incomplete as of the 2026-09-01 scan.
Source cards
Official temperature
NOAA Climate at a Glance, contiguous-U.S. annual average temperature, 1895–2026 with a 1901–2000 base period; 2025 is the last complete year. ncei.noaa.gov · annual 2025 report
Secondary anomaly sequence
Station-network national anomaly, 1869–2026, 158 annual values in °F departure; 2026 is year-to-date. Secondary to NOAA, shown for its pre-1895 reach. hottestsince.com
Disasters
EM-DAT via a GFDRR dashboard workbook, 1900–2025, record-level with ISO country and DisNo. IDs — the correct structure for a U.S.-only annual count. OWID’s chart of the same source runs 1900–2026 (2026 partial). gfdrr.github.io · ourworldindata.org
Findings
2024 is the warmest year in the 158-year anomaly sequence at +2.12 °F; 2026 stands at +1.59 °F year-to-date and cannot yet be ranked.
hottestsince.comNOAA’s nClimDiv dataset, the basis of official U.S. temperature indicators, is documented for 1901–2023 anomalies in °F relative to national baselines.
epa.govThe OWID reported-disaster chart covers 1900–2026 and its own metric name — “reported” — carries the caveat: the series measures reporting as much as hazard.
ourworldindata.orgFor U.S.-declared (not EM-DAT) events, FEMA-based disaster declarations start only in 1953 — another reminder that no disaster record approaches 1800.
baselight.app
The record, decade by decade
| Decade | Years with values | Mean anomaly, °F | Warmest year | Source |
|---|
Method: web scan conducted 2026-09-01 across 68 source rows (32 climate-source pages, 30 disaster-data pages, 6 EM-DAT/OWID chart pages). Temperature values are annual national anomalies in °F departure from the secondary 1869–2026 station-network sequence (158 values; 2026 year-to-date); official NOAA coverage is 1895–2025 with a 52.01 °F 1901–2000 base. No U.S.-only annual disaster counts appear because the supplied rows hold no parsed EM-DAT table; the identified 1900–2025 workbook is linked instead. Pre-1895/1900 periods and 2026 are drawn as hatched gaps, never interpolated.