# Drier heat waves threaten crops in Iowa | Climate Central

> Climate Central reports that warming temperatures and drought make Midwest corn and soybean crops more sensitive to heat, citing Iowa farmland examples. The article notes 2021 was tied with 1936 as the warmest US summer on record.

- Date: 2021-09-23 · published 2021-09-23T12:00:00.000Z
- Category: weather · region US · magnitude low
- Page: https://feedsoft.ai/events/44909-drier-heat-waves-threaten-crops-in-iowa-climate-central
- Commodities: [Corn](https://feedsoft.ai/c/CORN.md), [Soybeans](https://feedsoft.ai/c/SOY.md)

## Why it matters

This is a general climate-trend feature with no new supply shock, so its direct price impact is minimal.

## Similar past events

| Commodity | Date | Event | 5-day % | 20-day % |
| --- | --- | --- | --- | --- |
| CORN | 2026-09-10 | [Midwest Drought Expands: Heat Wave Threatens Crops \| Feed & Grain](https://feedsoft.ai/events/12963-midwest-drought-expands-heat-wave-threatens-crops-feed-and-grain.md) | +4.3% | +1.1% |
| CORN | 2026-01-29 | [Heat wave hits Argentina, threatening corn and soybean crops](https://feedsoft.ai/events/13817-heat-wave-hits-argentina-threatening-corn-and-soybean-crops.md) | -0.3% | -0.1% |
| CORN | 2019-07-01 | [When Drought Threatens Crops: NASA’s Role in Famine Warnings](https://feedsoft.ai/events/57999-when-drought-threatens-crops-nasa-s-role-in-famine-warnings.md) | +1.3% | +0.2% |
| CORN | 2021-10-19 | [Harvest update in West Central Iowa - Brownfield Ag News](https://feedsoft.ai/events/44385-harvest-update-in-west-central-iowa-brownfield-ag-news.md) | +0.7% | +10.3% |
| CORN | 2022-01-11 | [The heat is on in South America - Grain Central](https://feedsoft.ai/events/43043-the-heat-is-on-in-south-america-grain-central.md) | -2.8% | +4.1% |
| SOY | 2026-09-10 | [Midwest Drought Expands: Heat Wave Threatens Crops \| Feed & Grain](https://feedsoft.ai/events/12963-midwest-drought-expands-heat-wave-threatens-crops-feed-and-grain.md) | +1.9% | +0.2% |
| SOY | 2026-01-29 | [Heat wave hits Argentina, threatening corn and soybean crops](https://feedsoft.ai/events/13817-heat-wave-hits-argentina-threatening-corn-and-soybean-crops.md) | +1.6% | +6.8% |
| SOY | 2022-01-11 | [The heat is on in South America - Grain Central](https://feedsoft.ai/events/43043-the-heat-is-on-in-south-america-grain-central.md) | -1.0% | +14.1% |

## Sources

- climatecentral.org: https://www.climatecentral.org/partnership-journalism/drier-heat-waves-threaten-crops-in-iowa

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Data from Feedsoft AI (https://feedsoft.ai/). For information only; not investment advice.