From time to time, the calm and serenity of an average day will be abruptly interrupted by a powerful and overwhelming sound emanating from our cellular devices, alerting us of potentially hazardous weather conditions or an Amber Alert for a child faded away.

Beginning Oct. 3, alerts directly from President Trump will join this list after the weather delayed a test scheduled for this week. Testing is planned for Emergency Alert Systems (EAS) and Wireless Emergency Alert (WEA) systems, which are part of the integrated public alert and warning systems, including alerts presidential.

Here are some things to know about presidential alerts and the reasons why we will hear a noisy tone on October 3rd.

What are the presidential alerts?

Presidential alerts only concern "national emergencies," according to FEMA.

It is unclear what will be a national emergency for these alerts. Or if these criteria will change. Or who controls if a presidential alert is triggered.

When is the first test?

The first test of the presidential alert system was initially scheduled for Thursday afternoon. Severe weather conditions on the east coast postponed the test to the October 3 backup date, according to FEMA.

That day, the WEA test message will start at 2:18 PM. EDT, according to FEMA. The EAS message will be sent at 14:20 EDT.

The cell towers will broadcast the test for about half an hour. According to FEMA, during this period, cell phones within reach and wireless service providers participating in WEA will likely receive the messages.

What will the alert say?

According to FEMA, the test message will have a heading indicating "Presidential Alert" and a text indicating:

"THIS IS A TEST of the national wireless emergency alert system. No action is necessary. "

Can I retire?

The answer to the question that may be most urgent, namely if one can withdraw from presidential alerts, is simple: no.

Thursday's test will be the first presidential-level WEA test nationwide and can not be withdrawn, according to a statement from FEMA.

And, according to two main laws regarding emergency communications, people will also not be able to withdraw alerts in the future. The Communications Act of 1934 gave a president the power to use communications systems to send alerts and warning messages during national emergencies.

While the Alert, Alert and Response Networks Act of 2006 allowed wireless subscribers to not receive certain alerts, the law did not allow subscribers to withdraw from presidential alerts.

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