Have you heard of Nixle? You can subscribe to the service to receive text alerts on local emergencies such as traffic closures or police notices.
Locally, we have been dealing with lane closures due to a sinkhole and I was able to stay updated with my cell phone.
To sign up for Nixle, text your zip code to 888777. Nixle services government agencies and organizations in all 50 states.
You can also sign up for email alerts here.