Firefighters have issued a major warning after a popular household item caused a major and deadly fire to rip through a home in Sydney’s Upper North Shore.

Emergency services were called to a property on Adamson Ave in Thornleigh shortly after 7.40am on Thursday after reports of a fire.

It took NSW Fire and Rescue half an hour to extinguish the flames before firefighters searched the home.

They confirmed smoke alarms were fitted in the home at the time of the blaze.

“The occupants had left for work earlier that morning,” a statement read.

“Unfortunately, their pet cat and dog were overcome by the smoke in the home and died.”

Fire and Rescue NSW is investigating whether the house fire was caused by an overloaded power board.

Emergency services have responded to more than 3000 fires i

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