Most likely a scammer spoofing their number-the full text would read as 'Uvalde Consolidated Independent School District' (actually managed to find it on Google)
Called my landline on March 2, 2017..... Caller ID just shows Uvalde Consolid....... no message left. I called them back after dialing *67, and it was Uvalde High School. I don't live in that area and don't have school children, so I have no idea why they would be calling my number.
Most likely a scammer spoofing their number-the full text would read as 'Uvalde Consolidated Independent School District' (actually managed to find it on Google)