PERTH, Australia -- A man has died defending his home from an intense wildfire that razed wooded hills near Australia's west coast city of Perth, destroying 49 houses.

The 62-year-old man collapsed and died on the roof of his home in suburban Hovea on Perth's eastern fringe on Sunday. He was believed to be hosing water onto his roof to protect it against embers, state fire service spokesman Allen Gale said Monday.

The house was not damaged, Gale said.

Erractic winds whipped up 20-meter flames. The fire destroyed 49 houses and badly damaged another home in a picturesque region known as the Perth Hills, where homes are scattered through eucalyptus and jarrah forests, Gale said.

The destruction toll was revised up from 46 houses following the discovery of three dwellings that were burnt on Sunday, he said.

Four people initially reported missing in Parkerville -- the village where the fire started and where four homes burned down -- were found unharmed, Gale said.

The wildfire risk has been heightened by heat wave conditions on the west coast. Perth's temperature reached 43 degrees Celsius on Saturday, the city's hottest day in six years.

About 275 firefighters on Monday continued to fight the blaze, which burned through about 350 hectares of woodlands and has been contained since Sunday night.

The firefighters' battle to keep the fire within containment lines was helped by cooler conditions. Temperatures in the hills region peaked at 41 C on Sunday, but a sea breeze pushed the forecast maximum down to less than 30 C on Monday.

Gregson said there was nothing his team of 385 firefighters could have done to save more houses.

"When you have a fire front of the magnitude they had yesterday, it was unassailable," Gregson said.

The service said two firefighters were treated for heat exhaustion.