Aerial images show how fire-besieged towns looked before and after deadly Victorian blazes

Aerial images of bushfire-ravaged towns have captured the devastating extent of the damage caused by last week's Victorian bushfire emergency.

More than 410,000 hectares of Victorian bushland has burned since last Wednesday, when catastrophic fire conditions sparked dozens of blazes across the state.

Several fires continue to burn, including two major blazes at Longwood and Walwa.

READ MORE: Almost 300 homes wiped out by bushfires as next fire danger period flagged

More than 1000 structures across Victoria have been damaged or destroyed by the fires, including 290 homes which have been reduced to ash and rubble.

The devastating fires turned deadly over the weekend, after authorities discovered the body of cattle farmer Max Hobson in the Longwood fire ground at Gobur.

Aerial pictures taken by Nearmap show properties in Natimuk and Harcourt before and after the fierce infernos raged through the towns.

At least 30 homes were destroyed in Natimuk during the fires, while the blaze in Harcourt and surrounds claimed 54 homes.

Victoria Police are investigating the causes of major fires, including the Ravenswood South and Walwa blazes, while arson and explosives detectives probe the Longwood fire.

Almost $200 million in federal and government support has been announced in recent days to support fire-affected communities.

Images captured by Nearmap as part of property intelligence show the impact of the fires.