THE Bureau of Meteorology has issued a cyclone warning for a tropical low that is developing off Western Australia's Pilbara Coast. 

The Bureau of Meteorology said the system was estimated to be 230km north of Karratha and 285km northwest of Port Headland at 9pm (WDT) on Sunday and heading west at 21kph.

"The low may develop into a tropical cyclone overnight as it moves west, southwest parallel to the coast," the bureau said.
"Gales may develop in coastal areas on Monday or Tuesday."

A cyclone warning is current for the coastal areas from Wickham to Exmouth.

The Fire and Emergency Services Authority has issued a blue alert to people in the areas of Roebourne, Wickham, Point Samson, Karratha and Dampier.

Residents should identify a safe place for pets and consider relocating people with special needs such as the sick and elderly.

AAP