Even though a nuclear attack is considered highly unlikely in New York City, the Emergency Management Department released a public service announcement to ensure that residents are prepared should the improbable event occur.

On Monday, the government agency released a PSA of what New Yorkers should do if sirens were to signal an oncoming nuclear strike.

The video focused on three key steps in the event of a nuclear attack, get inside, stay inside, and stay tuned.

“As the threat landscape continues to evolve, it is important that New Yorkers know we are preparing for any imminent threats and are providing them with the resources they need to stay safe and informed,” Zach Iscol, New York City's emergency management commissioner, said in a statement.

In the video, empty streets can be seen as sirens sound off in the background. An announcer then walks into the frame to offer guidance.

“So there’s been a nuclear attack. Don’t ask me how or why, just know that the big one has hit. OK. So what do we do?” she says.

In the first step, residents are advised to head inside as quickly as possible. The PSA warns that sheltering in a car is not an option, and individuals should go inside a building and stay away from windows.

The second step instructs residents to remain inside and shut all doors and windows. Residents are advised to shelter in a basement or move to the middle of the building.

Anyone who was outside during the blast should get clean immediately by bagging all clothing and showering to remove any radioactive ash or dust from the body.

The final step for the nuclear strike recommends New Yorkers follow the media for the latest news on the attack. Residents can sign up for Notify NYC to receive updates and should remain inside until officials say it’s safe.

The PSA on nuclear attacks comes after officials under Russian President Vladimir Putin warned that the U.S. could face the “wrath of God” if it participates in an effort to pursue war crimes charges for Russia’s attack on Ukraine.

The skyline of midtown Manhattan in New York City is seen from the United Nations headquarters in New York City, New York, U.S., July 20, 2018.
The skyline of midtown Manhattan in New York City is seen from the United Nations headquarters in New York City, New York, U.S., July 20, 2018. Reuters / BRENDAN MCDERMID