Much of the federal government is on the verge of shutting down​ if Congress does not reach a deal to approve new funding by Oct. 1. Here's what that means.

Staying open: The VA's primary call center, its veterans crisis line, suicide prevention programs, homelessness services, and caregiver support. The federal government shutdown looming this week is not actually a complete shutdown.

A shutdown of the federal government looms Oct. 1 if Congress and President Donald Trump cannot work out a spending deal. When a shutdown occurs, government offices close, national parks may become inaccessible or unstaffed,

While some federal contracts will stop work in the event of a shutdown, others will continue on, particularly if they’re funded by appropriations from past fiscal years. PSC officials explained, however, that problems emerge when contractors need an action by or information from a federal employee who is furloughed.

Social Security is considered mandatory, and funding for those programs is generally unaffected by a shutdown. Medicare benefits also continue uninterrupted. The federal government has enough money for Medicaid to fund the first quarter of the next fiscal year, according to the Centers for Medicare and Medicaid Services.

Bettors in prediction markets expect the federal government to shut down, despite Monday's last-ditch talks between President Trump and congressional leaders. Traders on Polymarket, a crypto-based prediction market,

The White House last week told federal agencies to begin preparing for mass firings if Congress does not pass a deal to avert a government shutdown.

Lawmakers must pass a funding bill by the end of September, or the government will shut down. Republicans and Democrats are at an impasse.