he emergency communications drill will begin at 2:18 p.m. EDT through 2:20 p.m. EDT. Every cell phone in the US will receive a text message from President Trump.

All US wireless firms and more than 100 mobile carriers are participating in the exercise that allows for presidential alerts, FEMA wrote in a Thursday press release.

"The EAS [Emergency Alert System] is a national public warning system that provides the president with the communications capability to address the nation during a national emergency," FEMA said in a statement.

Cell phones will receive a text message that states "Presidential Alert" and "THIS IS A TEST of the National Wireless Emergency Alert System. No action is needed."