Temperature Sensor +Water System or Email/sms

Hi i am new in arduino forum I want to make a new project that uses a temperature sensor and when temperature rises a lot then a water system will be activated ( plus can arduino 2 tasks ? ? ) Or it will send email /sms to me (user) Not forget to mention that the device will be in open field without internet connection ( how to send email then ? or sms :roll: ? ) Or power supply ( maybe a big powerbank will be a solution but for how many days ? )

Which board will i need or what extra accessories ? Is arduino suitable for this or i have to look something like raspberry pi ?

answers at your other post about same topic http://forum.arduino.cc/index.php?topic=490765.0

Next time. One post and one post only on the same topic!