The warning system would give the president the capability to address the country through a personal cellphone during national emergencies.

The Federal Emergency Management Agency (FEMA) will test an alert that would allow President Trump to communicate with you via your cellphone during national emergencies Wednesday afternoon.

FEMA pushed back the test of a national system last month. The test will allows "presidential alerts" to hit the majority of cellphones to October 3 at 2:18 p.m ET. The goal is to warn residents of national emergencies, such as dangerous weather.

The warning system "provides the president with the communications capability to address the nation during a national emergency," FEMA said in a notice posted on its website.

Some cellphone users will receive a message with a header that reads "Presidential Alert." The text then will say: "THIS IS A TEST of the National Wireless Emergency Alert System. No action is needed."

📳TOMORROW (Wednesday) 10/3: Expect to get a test emergency alert message on your phone at 2:18 PM EDT.



You’ll hear a loud tone & vibration. This is a nationwide test of the Wireless Emergency Alert system.



Questions? Check out https://t.co/Op8T9AEpiF. pic.twitter.com/RIdPay87eN — FEMA (@fema) October 2, 2018

But not everyone is on board with the notion of presidential notifications.

"I don't want this," actress Alyssa Milano tweeted on September 15. "How do we opt out, @fema?"

I don’t want this. How do we opt out, @fema? I know trump isn’t big on consent but I don’t consent to this. https://t.co/A04twRU39p — Alyssa Milano (@Alyssa_Milano) September 15, 2018

Seems like Milano is out of luck.

Under federal law, users can opt out of the alerts for "imminent threats" and AMBER alerts about abducted children but "not for presidential messages," FEMA warns.