Well, here we go… At 12:01 a.m. on Wednesday, October 1st, the federal government officially shut down after Congress couldn’t get it together to pass a budget.

What does that mean for us here in Mass? For starters, the state’s roughly 25,500 federal employees are on the front lines of this mess. “Essential” services—think TSA at Logan, the USPS, and air traffic controllers—will keep running, but those workers won’t be getting paychecks for now. “Non-essential” services, like federally-run parks and museums, are expected to shut down, with staff sent home without pay.

Beyond that? We’re looking at ripple effects across the economy and potential job layoffs.

Here’s what is shutting down (from the Globe):

• The Environmental Protection Agency will stop inspecting drinking water and cleaning up contaminated sites;
• The Food and Drug Administration will stop inspecting most farms and other facilities;
• The Small Business Administration, which provides about half a billion dollars to Massachusetts companies annually, will stop processing new loan applications;
• The National Institutes of Health will delay scientific research, further straining a Massachusetts industry already hurt by President Trump’s funding cuts.

Here’s what could shut down:

While bathrooms and visitor centers at national parks will be locked up, certain parks themselves may remain open to the public. Here in New England, the federal government manages more than a dozen landmarks, historic sites, and trails—like Acadia National Park up in Maine—so expect at least some closures and limited access until things get sorted.

The Boston Globe has everything you need to know about the shutdown.