What the Weather Did

Sort the ledger by lives lost and the famous storms fall down the page. Heat, which rarely makes a photograph, leads. Flood water is second. The tornado - the hazard with its own film genre - is third, and hail, the loudest thing that ever hits a roof, kills almost no one. The bar is deaths; the line beneath it is how often the event shows up and what it billed.

1. 01 Heat 13,400 deaths
   22,000 events · $12B damage
2. 02 Flood & Flash Flood 10,900 deaths
   185,000 events · $180B damage
3. 03 Tornado 6,400 deaths
   74,000 events · $95B damage
4. 04 Winter Weather & Cold 5,100 deaths
   230,000 events · $55B damage
5. 05 Lightning 4,300 deaths
   25,000 events · $2.4B damage
6. 06 Hurricane & Tropical 3,900 deaths
   6,200 events · $480B damage
7. 07 Rip Current 2,400 deaths
   8,100 events · no direct damage
8. 08 Thunderstorm & High Wind 2,100 deaths
   620,000 events · $60B damage
9. 09 Marine & Coastal 1,600 deaths
   34,000 events · $3.2B damage
10. 10 Wildfire 1,150 deaths
    9,400 events · $75B damage
11. 11 Hail 120 deaths
    430,000 events · $90B damage
12. 12 Other 300 deaths
    45,000 events · $6.0B damage

○ Illustrative Illustrative stand-ins in the true shape of the record: the ranks hold, the decimals do not. See Methodology.

"Worst" is a choice of yardstick. This board keeps three of them: lives, frequency, dollars. Pick one and the leaderboard reshuffles; no family tops more than one column. That is the whole reason a single headline hazard misleads - the answer changes with the question.

○ Illustrative Illustrative. Teal carries lives, bronze carries dollars, slate carries the count - the colors never trade jobs on this page.

Put every family on one field - lives up the side, dollars along the bottom - and the ledger's two stories come apart. Heat holds the top-left corner: the deadliest hazard barely dents the property column. Hail holds the bottom-right: ninety billion dollars of dented roofs and almost nobody hurt. Only flood water is fluent in both currencies.

Divide each family's toll by how often it appears in the log and the frequency board flips upside down. A hurricane entry is roughly two thousand times as lethal as a hail entry. The everyday hazards - thunderstorm wind, hail - are nearly harmless one event at a time; they earn their place in the toll by sheer volume.

The annual line never sits still. Its spikes are single afternoons: a tornado through Waco, a heat dome parked on Chicago, a levee failing in New Orleans. Between the spikes the floor itself drifts upward - more people in harm's way, and a database that learned to count more of them.

Averaged by decade, the noise of single disasters smooths into a slope. The 2010s were roughly twice as deadly as the 1950s. That slope is three things braided together - a hotter climate, far more people and property in the storm belt, and a ledger that counts more carefully than it used to. The next section unbraids them by family; the last one unbraids the ledger itself.

Split the toll by family and the twentieth century trades places with the twenty-first. Tornado and lightning deaths fall decade over decade - radar, sirens and forecasting at work. Heat, rip currents and wildfire climb. Read the early decades gently: before the mid-1990s the log barely counted anything that wasn't a tornado, hail or wind.

Severe weather keeps office hours. Tornado deaths climb through the spring; then heat takes the ledger over, and July is the deadliest month of the year by a wide margin. September belongs to hurricanes, the year's shoulders to cold. The hazard that leads each month's toll is printed under the chart.

Darker is deadlier. Texas, Florida and California carry the largest raw counts - big, populous, and exposed to nearly every family on the board. But a raw count tracks population as much as danger. Divide by residents and the burden moves inland, to the Plains and the Deep South, where the same storms fall on far fewer people.

The dozen heaviest state ledgers. Texas leads on almost every family at once - it is big, exposed to all of them, and the most populous state in the storm belt. Note how weakly the second column tracks the first: a single hard freeze or heat wave in a dense metro outweighs years of routine storm reports.

1. Texas 5,300
   175,000 events
2. Florida 2,500
   92,000 events
3. California 2,200
   78,000 events
4. Illinois 2,000
   44,000 events
5. Pennsylvania 1,750
   46,000 events
6. Missouri 1,650
   52,000 events
7. New York 1,550
   58,000 events
8. Louisiana 1,500
   41,000 events
9. Oklahoma 1,400
   61,000 events
10. Alabama 1,350
    49,000 events
11. North Carolina 1,250
    55,000 events
12. Georgia 1,200
    48,000 events

○ Illustrative Illustrative stand-ins. See Methodology.

Before trusting any trend on this page, look at the instrument that recorded it. The database logged only tornadoes until 1955, added hail and wind reports, then held under twenty thousand entries a year until the 1996 rebuild started counting all 48 event types at once. Every long-run rise above is part weather, part population, and part this line.