The Overlooked Impact of Flooding on Crops, Soils and Food Systems

By Esther Ngumbi and Christy Gibson Reprint | | Print |

When agricultural crops are lost to flooding, food costs rise, food systems are weakened, and our ability to meet our food security needs is threatened. Credit: Shutterstock

URBANA, Illinois, US, Jun 25 2026 (IPS) - Across the United States, record breaking extreme weather events have already occurred, including severe storms and Tornadoes in the State of Illinois to flooding in Texas, southern Wisconsin and the South. Throughout the summer, and the remainder of the growing season, additional severe weather events will come through including several hurricanes and tropical storms beginning with Tropical Storm Arthur.

While the impacts of severe weather on people, communities, and infrastructure dominate headlines, the damage flooding inflicts on agricultural systems, crop productivity, and food security often goes unnoticed and underestimated.

Equally concerning is the noticeable lack of focused dialogue among researchers, policymakers, and other key stakeholders in agricultural crop production and food systems, including farmers, about whether current best management practices and innovations are keeping pace with efforts to mitigate the negative impacts of severe weather and flooding on agriculture.

I have seen this firsthand in my research at the University of Illinois Urbana-Champaign. In just a few days, due to a lack of oxygen, crops like tomatoes and corn visibly stop growing, and when flooding is severe, they suffocate to death.

Belowground, flooding is also harmful to beneficial soil microbes that provide many benefits to plants, including improving nutrient availability and uptake, fixing nitrogen, promoting growth, boosting resilience to biotic and abiotic threats, and improving soil health and fertility.

By harming beneficial microbes and other organisms, including earthworms, flooding can disrupt the belowground ecosystem that sustains healthy soils, crop growth, resilient agricultural production systems, and food security.

Disturbingly, the impacts of flooding on crops and soils, as well as the beneficial web of microbes, can persist long after floodwaters have receded. Research shows that even after floodwaters have receded, plants continue to grow slowly and remain highly vulnerable to pests and diseases, further exacerbating crop damage and yield losses.

Alarmingly, current studies show that agricultural losses from flooding do parallel those caused by drought, and future projections indicate that the intensity, frequency, and severity of flooding events will continue to increase.

Ultimately, flooding causes systemic issues and disruptions across food systems, affecting all stakeholders connected to agriculture, a trillion-dollar industry.  These impacts that come along with flooding can increase food costs, trigger higher insurance claims, and place additional mental burden on farmers and agricultural workers.

The question then becomes: What can be done to prepare for this future? What best practices and innovations can be implemented? What can farmers, researchers, policymakers, and all stakeholders in agriculture do to ensure that the crops we depend on to meet food security, along with the practices and flooding mitigating innovations in place, can withstand flooding?

First, there is a need for more investment in flooding research in the United States and globally. Compared with drought, we know far less about the full extent of flood impacts on agricultural crops, from the onset of flooding through the post-flood recovery phase.

Additionally, we do not know whether the current best management practices and innovations that farmers are deploying to cope with flooding are effective.

Investing in research will enable researchers to build a comprehensive understanding of flood impacts on plants, soils, and microbiomes in current and projected future climates, while uncovering the many strategies plants use to resist, adapt, and thrive.

Notably, our understanding of flooding impacts to crops, microbes, agroecosystems, and agricultural productivity remains siloed and fragmented across disciplines. Yet flooding impacts span multiple disciplines, including plant biology, entomology, agronomy, microbial and soil ecology, predictive modelling, and climate systems biology and engineering.

Arguably, there is a need to collaborate across disciplines to develop a more integrated and holistic understanding of how flooding affects crops and agroecosystems. In doing so, we will advance scientific knowledge and lay the groundwork for developing solutions to address and conquer flooding and its negative impacts on agriculture.

Necessarily so, there is an urgent need to conduct field-based research across a spectrum of climates, soils, and management practices. Although researchers have made great strides in building foundational knowledge about flooding impacts on crops, most of this research has been conducted in controlled settings, primarily in greenhouses.

To capture the complexity and inherent variability of agricultural systems, soils, and environments, field experiments are necessary. These experiments can offer insights and help determine the factors that determine crop resilience.

A metric of success for researchers is collaborating with farmers and using farms as living laboratories to understand flooding and co-build flooding solutions. These collaborations offer many benefits, as farmers are the ones who suffer most, but also have on the ground intelligence that research may not have.

When researchers and farmers co-build solutions, the resulting insights, solutions, and innovations become more practical, trusted, and embraced by farmers and in turn, these can be quickly integrated and translated into the suite of strategies and solutions farmers are deploying to mitigate flooding.

Research alone would still not go very far. Policymakers, governments, philanthropists, the private sector, and the media are equally needed if we are to make strides in addressing flooding and its negative impacts.

Media outlets such as NBC, CNN, local TV news channels, and major outlets, including The New York Times, The Washington Post, USA Today, and The News-Gazette, can expand public understanding of flooding by discussing and sharing the rarely highlighted consequences of flooding for agricultural production. Greater visibility can raise awareness and highlight the need to invest in flooding research.

In the end, we cannot solve a problem we do not fully understand. Only by acknowledging and demonstrating the impacts of flooding through research and having the media and other stakeholders share widely about the consequenses of severe weather including flooding on agriculture can we begin to identify the sustainable short- and long-term solutions needed to protect our agricultural systems.

When agricultural crops are lost to flooding, food costs rise, food systems are weakened, and our ability to meet our food security needs is threatened. It’s time to paint a realistic picture of flooding and acknowledge its full impact. In doing so, we can begin to develop solutions that help us withstand flooding and the extreme weather-related challenges ahead. Time is of the essence.

Esther Ngumbi, PhD is Assistant Professor, Department of Entomology, African American Studies Department, University of Illinois at Urbana-Champaign.

Christy Gibson is an Illinois Distinguished Postdoctoral Scholar in the Department of Crop Sciences at the University of Illinois Urbana-Champaign, where she studies how floods and droughts reshape farming systems and the ecosystems that sustain them.