Text-to-911 is offered now as a method of reporting an emergency.  Text-to-911 The ability to send a text message to reach 911 emergency call takers from your mobile phone or device. However, because voice calls to 911 provide more information to 911 call centers, you should always make a voice call to 911 during an emergency whenever possible.

For more information on Text-to-911, visit the FCC's website here