You can sign up to receive email at any email address
SMS text messages about tsunami alerts if in USA by going here
If you want to be notified by mobile phone you can enter an email address that will send you SMS. Check that this works first by using this format depending on which cellular carrier you use:
Virgin Mobile email@example.com
I’m sure will work with AIS, DTAC, TRUE or any other Thai based mobile phone service – but, does anyone know the email address to send an SMS message to a phone?