The band’s All Within My Hands Foundation & American Association Of Community Colleges will distribute $1.5 million To 15 US schools.
Nearly 18 million acres of land have been destroyed from the bushfires that have been burning since September.
The band made the donation through its All Within My Hands non-profit foundation.
The metal titans will play be headlining at the Epicenter Festival, Welcome To Rockville, Sonic Temple, Louder Than Life and Aftershock next year.
The final donation came on 25 August, when the band donated a €63,000 cheque to Freezone Mannheim, a German homeless youth aid group.
The band the donation ahead of their sold-out show Wednesday in Romania’s National Arena, through their All Within My Hands Foundation.
The metal titans donated to Dublin's Capuchin day centre which helps provide for homeless people and the ISPCC for children.
The metal titans say they were “overwhelmed” following their second Day Of Service which saw over 3,000 fans volunteer at their local food banks across the US.
The seventh annual Metallica night with baseball’s San Francisco Giants will take place on 26 April.
The metal titans’ rare acoustic performance of their classic anthem was captured in San Francisco in November last year.
This rare version of the band’s legendary 1983 track features on the new album ‘Helping Hands… Live & Acoustic At The Masonic’.
The initiative, through the band’s All Within My Hands Foundation, will see 10 colleges receive $100,000 each.
The album documents the inaugural Helping Hands Benefit Concert held in San Francisco on 3 November.
In co-operation with Feeding America, Metallica made contributions to its local partners in each city the band performed in during the 2017 stadium tour.