Every dispatch center in California must accept text message requests for help starting Friday. The new 2021 law (AB 1168) will make California’s 911 emergency dispatch system more robust to serve the deaf as well as those in rural parts of the state. Some counties do not have the option in place yet but are working on changing their system. Other Counties already have such a service in place, such as Sacramento County which set up a text-to-911 service in 2018. You can read the text of the bill
here.