Actually, both 911 and 112 have text message support - for some part. It was implemented for people who have hearing or speaking problems. Still, both recommend calling above texting, as it's easier to convey information that way.
Text-to-911 is the ability to send a text message to reach 911 emergency call takers from your mobile phone or device. However, because text-to-911 is currently only available in certain locations, you should always make a voice call to contact 911 during an emergency whenever possible.
www.fcc.gov
www.sos112.be