https://thenextweb.com/google/2019/08/01/google-will-help-you-get-aid-from-911-without-speaking/

While we all hope to never be in a situation where we need to call 911, being able to relay the right information to emergency operators is crucial. Unfortunately, sometimes you might be caught in a situation where you can’t actually speak to the operator – perhaps because you’re in immediate danger or your speech is impaired.

Google’s new 911 feature is meant to address these situations. Using the speech technology seen on Duplex and the Pixel’s call-screening technology, Google will be able to point the operator to your location and the type of help you need – medical, fire, or police – without you uttering a word.