Porter County Emergency Management Agency is encouraging county residents to report damages from Sunday’s storm after Valparaiso saw 80-mph winds, one person died when a tractor-trailer blew over at Pratt Industries, and thousands of people were left without power.

The storm felled trees and power lines alike, leaving more than 15,000 households still without power late Monday morning, according to NIPSCO. Because of the extent of the damage, the utility said it is not able to provide an estimate of when the power will be restored.

“We anticipate a multi-day outage for some customers and ask you to make the necessary plans to stay safe if you are affected,” the utility said on its outage webpage.

The region was under a tornado watch and then a severe thunderstorm warning when winds and rain picked up shortly before 4 p.m. Sunday.

Around 4:15 p.m., deputies with the Porter County Sheriff’s Department received a report of a single-vehicle crash with injuries on the property of Pratt Industries, 3050 Anthony Pratt Drive, in Center Township, according to a release.

Deputies found a tractor-trailer on its side. The man driving the truck had died. An initial investigation showed the tractor-trailer was eastbound on the business property when severe crosswinds blew the tractor-trailer over. The driver was located outside of the passenger compartment and died from his injuries, police said.

The Porter County coroner’s office has identified the driver as Jagbir Singh, 34, of Ontario, Canada.

Northern Indiana Public Service Company reported late Monday morning that crews continued to work to restore power after the storm, which brought reported wind speeds of up to 80 mph to the most impacted areas, including Valparaiso.

“To date, power has been restored to more than 60% of customers who were originally affected, and approximately 15,300 customers remain without power,” the utility said on its outage webpage. Much of the remaining work is to address the damage caused by high winds, including removing trees from lines and replacing broken poles.

There are nearly 1,500 individual repairs that need to be made, according to NIPSCO.

Porter County Emergency Management Agency, meanwhile, has worked with the Indiana Department of Homeland Security to set up a process for reporting storm damage, according to a release.

Porter County residents are encouraged to contact Indiana 211 at 866-211-9966 or go to in211.org and click “damage reporting” to submit a report of severe storm damage from Sunday.

While the reporting line is only for residents of Porter County impacted by the storm, officials said, that could be changed and more counties could be added as the recovery process continues.

Agricultural damage should be reported to the Purdue Extension, officials said.

Creating a report is the first step toward potentially receiving assistance in the event FEMA or the state can offer it, officials said.

According to the National Weather Service, storms are predicted for Tuesday night and Wednesday could see another round of severe weather.