Perth bakers, Miller + Baker, will hold a sale Thursday morning from 9am to 11am to raise funds for community-led flood relief and recovery efforts in the Fitzroy Valley.

Miller + Baker, at 236 Lake Street, Perth, said January 26 is "not a day to celebrate", and instead they are volunteering their time and venue to sell goods, raising money to donate to the fund established by Fitzroy Valley Indigenous-led group, Leedal Foundation.

An alliance of Indigenous-led organisations has been working tirelessly to deliver relief and recovery support in Western Australia's Kimberley region after it suffered the worst flooding in the state's history.

Leedal Foundation, Marra Worra Worra resource centre, Bunuba Aboriginal Corporation, Marninwarntikura women's group, Yanunijarra, Gooniyandi, and Nindilingarri Cutural Health Service have united and are working with representatives of Fitzroy Valley's multiple Aboriginal communities to coordinate a locally-led flood recovery.

Leedal worked with state emergency services to distribute food and other essentials early in the flood crisis triggered by ex-Tropical Cyclone Ellie, and has also raised almost $600,000 in donations, including $500,000 from Woodside Energy.

The Foundation's executive chair, Patrick Green, said local Indigenous organisations had collaborated to help the communities.

Secure food supplies, accommodation, medical care, and other essential supplies and services remain a challenge as key supply routes were damaged or destroyed by the floods.

WA Premier Mark McGowan has warned it could take months to restore vital infrastructure.