A SUSPICIOUS fire destroyed 12 hectares and threatened homes in Madora Bay on the weekend, while a small scrub fire in Singleton was brought under control within a couple of hours on Monday morning.
The fire in Madora Bay was reported on Saturday about 8am. It started between Madora Beach Road and 100m east of the Madora Bay Tennis Club.
Houses on Charlotte Court were under threat and residents were told to evacuate.
A watch and act alert was issued for the area bounded by Orelia Road, Albion Road, Sabina Road, Cornwallis Road, Swiftshire Road, Madora Beach Road and Mandurah Road.
The western end of Madora Beach Road and Angalore Road were closed.
A bushfire all-clear was issued after 3pm on Sunday.
Authorities received a call about the Singleton fire about 10am on Monday, which had started on Eucalypt Close near the intersection with Harmony Parade.
A crew from Mandurah Fire and Rescue Service and two each from Secret Harbour Volunteer Fire and Rescue and Singleton Volunteer Bush Fire Brigade had the 70m x 20m fire under control by 10.43am and completely extinguished by 12.24pm.
A Department of Fire and Emergency Services spokeswoman said the fire was suspicious and police were investigating.
Anyone who sees suspicious behaviour should report it to Crime Stoppers on 1800 333 000.