Map showing drought conditions in the western United States in 2020

Does Less Pollution Mean Less Precipitation?

IIHR researchers Wei Zhang and Gabriele Villarini (IIHR director) have published research linking urban sprawl to an increase in rainfall and flooding during Hurricane Harvey.
IIHR grad student Nancy Barth in front of the U.S. Capitol.

Barth Takes D.C. by Storm

IIHR graduate student Nancy Barth recently traveled to Washington, D.C., to present her doctoral research on Capitol Hill.
Two government officers guide an inflatable boat through floodwaters in Houston, Texas, after Hurricane Harvey.

IIHR Research Links Urban Sprawl and Flooding

Researchers from IIHR at the University of Iowa and Princeton University found that Houston's urban density contributed to the storm’s intense flooding. The study is published in the journal Nature.