Scorchers to bring horror bushfire threat

EXTREME temperatures over the next two days are expected to bring Western Australia's most severe bushfire conditions for the season, authorities say.

The Bureau of Meteorology forecasts "very hot" conditions from tomorrow with temperatures of about 40 degrees in Perth city, paired with east to northeast winds.

"Fire danger ratings of extreme to catastrophic are possible over most of the southwest land division as well as the southwest Goldfields on Tuesday," the Fire and Emergency Services Authority of Western Australia said.

"If you live in an area with a catastrophic fire danger rating you should put your survival first and leave early. That is hours before a fire starts. Under no circumstances will it be safe to stay and defend your home."

The authority suggests that residents from at-risk areas spend Monday "at the beach, shopping in the closest major town or with family and friends away from bushland".

Total fire bans are yet to be issued but may be later today. Emergency service crews claim to be well prepared for the fire threat.

On Tuesday, Perth is expected to reach 36 degrees, with the chance of a shower before cooler temperatures start from Wednesday.