Repeated power disruptions in the Western Australian goldfields region are forecast to lead to around one month of lost oxide production at Lynas Rare Earths' (ASX:LYC) Kalgoorlie facility in the second quarter of fiscal year 2026, according to a Tuesday note by Jefferies.

Northern Star Resources (ASX:NST) is in the process of constructing a 120 megawatt gas-fired facility to further decouple from the aging Parkeston power station and unreliable South West Interconnected System generation infrastructure. The analysts did not revise their Northern Star production forecasts.

Evolution Mining's (ASX:EVN) Mungari site experienced repeated, short-term shutdowns in the first quarter of fiscal 2026 due to load‐shedding impacts, and management comments suggested around a week of production loss.

The analysts maintained their production forecast at Mineral Resources' (ASX:MIN) Mt. Marion facility, given that it has continually demonstrated feed-rate flexibility.

The material underinvestment in the grid will not be remedied quickly, and South West Interconnected System customers such as Lynas will need to seek alternative sources of power, such as power purchase agreements with other providers.

The investment firm set a hold rating for Lynas and a price target of AU$17 per share, a buy rating for Northern Star and a price target of AU$28 per share, an underperform rating for Evolution Mining and a price target of AU$8 per share, as well as an underperform rating for Mineral Resources and a price target of AU$33.50 per share.