This does not sound like renters insurance (although some landlords may require their tenants carry renters insurance). Renters insurance typically covers a tenant’s property and damage caused by a tenant to a landlord’s property.
What Starmom2021 describes sounds more like the
mortgage lender has required increased insurance coverage to ensure the property is adequately insured - which it often isn’t in Iowa due to Iowa insurance companies cutting back on what they will cover or how much they will cover. It sounds like the landlord/property owner is passing on these increased insurance costs to the tenants.
Here is a pretty good look at what homeowners are facing in Iowa when trying to insure their homes to meet their lenders’ requirements, published by the
Des Moines Register earlier this year:
https://www.desmoinesregister.com/story/news/local/2024/05/31/iowa-insurers-cut-roof-coverage-customers-get-stuck-with-the-bill/73779335007/
As severe storms and other natural disasters across the country become more frequent, and as damages to structures become greater, insurance companies are struggling financially to satisfy all of the claims that are submitted. The insurance premiums are increased significantly or some insurers are even packing their bags and moving out of some communities and even some states (e.g., Florida due to flooding damage claims, California due to wildfire damage claims, Iowa due to tornado damage claims).