(WTAJ) – As retail stores continue to close and tech companies around the world are laying off workers, it’s easy to worry about job security right now.

Thanks to a federal law called the WARN Act, which stands for Worker Adjustment and Retraining Notification Act, companies of a certain size must warn before they lay off or even close their operations.

While many states may have different requirements, Pennsylvania only requires what the national WARN Act requires.

The WARN Act requires employers with 100 or more full-time employees to give 60 days’ notice of plant closures or mass layoffs. A mass layoff is defined as a loss of 500 or more jobs at one workplace, or a loss of 50 to 499 jobs if that number represents more than 33% of the company’s workforce.

Some states, including Pa., post these WARNING notices online and you can just google your state and “WARN notice”.

For Pennylvania’s announcements, organized by month and year, go to click here.

From manufacturing to retail, businesses are required to file a notice with PA such as: B. David’s Bridal, who will issue layoffs throughout the year in PA, including in Blair, Dauphin and Erie counties.

In March, Walmart requested that nearly 600 employees in Bethlehem be laid off beginning in June, and Chewy Inc. requested that its Mechanicsburg warehouse be closed, leaving over 500 unemployed in the area.

A Department of Labor spokesman told Nexstar: “Some states post a list of WARNs received on their websites. However, they are not obliged to do so. As a result, the frequency and amount of information often varies.”

The latest jobless claims figures released on Thursday show that 13,000 more people filed for unemployment benefits in the last week of April compared to the previous week. In all, about 1.8 million people accumulated unemployment in the week ended April 22.

The national unemployment rate was still quite low at 3.5% last month.

For more information on layoff notices and the WARN Act in Pennsylvania, visit the Department of Labor’s website by clicking here.

The Hill contributed to this story.