Mexico City has made changes to its emergency announcement service known as 911 CDMX. The service now sends messages to people’s smartphones warning them of earthquakes. The changes come after a magnitude 7.1 earthquake hit Mexico’s capital on September 19. The quake killed 369 people and caused 38 buildings to collapse. Officials announced the new smartphone program last week. Mayor Miguel Angel Mancera said users of the free 911 CDMX program will receive messages for any earthquake strong enough to damage the city. The program will send sound messages and cause the smartphone to vibrate.

What does magnitude mean?
phone notification
shock and tremor
size or extent
damage from earthquakes
What will the messages do?
warn people
send a signal
vibrate buildings
cause earthquakes
The quake caused buildings to collapse.
stand
collapse
vibrate
shake