Before the first day of spring, Phoenix reached 100°F. Temperatures in some areas of the Southwest exceeded 112°F, which would have been remarkable in late July but were just astounding in March. Over 19,800 daily heat records were broken nationwide in a single month, and over 2,000 locations set records for March alone. These records are more difficult to break because monthly records necessitate surpassing the worst of the worst over decades. With temperatures 9.35 degrees Fahrenheit higher than the average for March in the 20th century, the continental United States recently recorded its most unusually hot month in 132 years of record-keeping. That is superior to all previous Marches. Every month, it beats. Never.
And a sizable economic bill is going unpaid and uncounted somewhere between that reality and what is discussed during federal budget hearings.
Washington has a fairly sophisticated system in place to count specific types of climate damage. Hurricanes are designated as disasters. FEMA deployments are triggered by floods. Events with visible, concentrated, geographically bounded damage—the kind that takes good pictures and fits neatly into an official damage estimate—are the foundation of the Stafford Act, which regulates federal disaster relief. That is not how heat waves operate. Millions of individual choices, postponed health outcomes, strained agricultural systems, and deteriorated infrastructure all contribute to their harm. The levee does not break at a single point. The expense simply builds up silently, primarily off the federal ledger, and appears months later in hospital admissions statistics, crop price indices, utility bills, and water authority budgets that no one can link to a single Phoenix March afternoon.
The agricultural aspect on its own merits greater consideration than it currently receives. According to NOAA, the month that broke temperature records was also a part of the driest January–March period ever recorded for the contiguous United States. Combining heat and dryness is particularly detrimental to farming. The mountain snowpack in the western states, which is essential for summer water for farmers, cities, and ecosystems, was already below average coming into spring. The heat in March caused it to melt much faster than expected, leaving important river basins in what water managers are calling, to put it mildly, “uncharted territory.” It doesn’t manifest as a March catastrophe when that water is absent in July. Crop failures, fallow fields, municipal water restrictions, and increased food costs at a grocery store in September are examples of how it manifests. There is a causal chain. There is virtually no federal accounting for it.
IMPORTANT INFORMATION TABLE — MARCH 2026 U.S. HEAT WAVE
| Category | Details |
|---|---|
| Event | Record-breaking March 2026 heat wave across the continental United States |
| Peak Temperature | Up to 112°F (44.4°C) in parts of the Southwest |
| Average March Temperature | 50.85°F (10.47°C) — 9.35°F (5.19°C) above 20th-century normal |
| Historical Significance | Most abnormally hot month in 132 years of U.S. records (NOAA); beat any prior month regardless of season |
| Previous Record | 8.9°F above normal, set in March 2012 |
| Average Daytime High | Nearly 1°F warmer than the average April daytime high |
| Temperature Records Broken | Over 19,800 daily heat records; 2,000+ monthly records broken |
| States Affected | At least 14 states set all-time March records |
| Concurrent Conditions | Driest January–March on record for the contiguous U.S. |
| Attribution | Events on March 20–21 described as “virtually impossible” without human-caused climate change (Climate Central/World Weather Attribution) |
| Snowpack Status | Critical snowpack at record-low levels; key western basins described as “uncharted territory” |
| Upcoming Amplifier | Super El Niño forecast by NOAA and Copernicus for late 2026/2027 — potentially rivaling 2015–2016 record |
| Why Costs Go Uncounted | Heat waves lack Stafford Act disaster designation; damage is diffuse, cumulative, and hard to isolate in federal accounting |
| Source Quote | “Climate change is kicking our butts” — meteorologist Jeff Masters, Yale Climate Connections |
Heat economics researchers believe that because so much of the damage is “lagged and layered,” the nation routinely underestimates the cost of a single extreme heat event. On days above specific temperature thresholds, worker productivity in outdoor industries like construction, agriculture, landscaping, and delivery decreases noticeably. No disaster damage report mentions that lost productivity.
In industries that no one is keeping a close enough eye on to link to particular weather events, it manifests as somewhat lower quarterly output. Emergency room visits are on the rise due to heat. In addition to being a human tragedy, heat-related deaths, which are more common among the elderly and outdoor workers, also result in quantifiable economic losses, such as lost working years, an increased burden on the healthcare system, and mortality costs that economists can compute but policymakers hardly ever bother to. According to research, areas affected by extreme heat events may have a persistent income disparity that lasts for years after the event—a difference between what their economy actually produced and what it would have produced under normal circumstances.
Infrastructure suffers a silent penalty of its own. Extreme heat causes asphalt to buckle. When the mercury rises too much above design parameters, railroad tracks that are calibrated for a particular temperature range need to have speed limits or emergency maintenance performed. Power lines droop. Stress in transformers. In order to meet cooling demand that arrives in March rather than June, the grid—which is already operating closer to its margins than the general public is aware of—runs harder and hotter. Utility bills, a visible expense that at least ends up in someone’s household budget, represent a portion of that demand. The costs associated with delayed maintenance, accelerated equipment deterioration, and emergency repairs that are reported as regular infrastructure expenses often vanish into operating budgets for municipalities and utilities, where the climate attribution is never determined.
The forecasting context is what most strikes me when I watch this develop in the data. NOAA and the European Climate Service meteorologists Copernicus is predicting that a super-strength El Niño will form later this year and intensify into 2027, possibly matching the 2015–2016 event that, according to subsequent research, pushed the Gulf of Mexico to a new sustained level of warmth that contributed to stronger hurricanes. Global temperatures momentarily exceeded the 1.5°C mark following the 2023 El Niño. For anyone considering the upcoming summer or the summer after, another super El Niño layered on top of the baseline warming that resulted in the hottest March in history is not a comforting scenario.
The meteorologists released their statements, the record was broken, the records were tallied, and the news cycle continued. The water managers in California recalculating reservoir projections, the construction workers who lost billing hours, the wheat farmers checking soil moisture readings that don’t match the historical average, and the ranchers in New Mexico witnessing their spring grass fail were all examples of what didn’t move on. “Climate change is kicking our butts,” stated Jeff Masters of Yale Climate Connections in a statement that briefly made headlines. The kicking’s financial costs are still mounting. Washington doesn’t currently have a number for it and isn’t actively looking for one.
