The first of three national studies will take place at noon on Thursday in the northern state of Wisconsin.
The other two are scheduled for early next week.
The results are expected to be presented to the Federal Reserve on Thursday.
The two studies are being conducted by the Federal Bureau of Investigation and the National Weather Service.
The first, which will be released on Wednesday, will look at how extreme storms affect people’s ability to travel, and the second, which is due in September, will examine the health effects of high-pressure systems in the U.S. The reports will be published online at the same time.
The rush is often cited as the largest in the United States and the largest the country has experienced.
It occurred in July in the central state of California, when a severe thunderstorm triggered an avalanche of snow and ice that reached the Sierra Nevada Mountains, causing more than 1.4 million people to be evacuated.
The weather system that triggered the avalanche was a system known as the “Pacific Northwest Superstorm.”
A storm surge of 2.3 feet (0.9 meters) was recorded at a point just south of Santa Barbara in Santa Cruz County, California, on August 15.