How Can I Collect Updated Trail Closure And Reopening Info At Multiple Levels (national, State, Local)?

Hi all,
I’m working on a personal side project and want to build something that keeps track of trail closures and reopenings in the U.S. The goal is to have the most up-to-date look at what’s closing or opening in parks.

I’d like to cover:

• National parks
• State parks
• County and city parks

I’m not sure the best way to approach this. Some questions I have:

1. Are there existing APIs or open datasets that already track this info?
2. If not, what would be the best way to scrape government/park websites that post closure announcements?
3. For anyone who’s done similar projects: how do you handle the fact that every agency posts things in different formats?

Any tools, techniques, or data source suggestions would be super helpful. Thanks!