The Rural Fire Service has issued 'Watch and Act' alerts for six fires burning across the Riverina region.

There is an extreme fire danger rating in place across all districts and a total fire ban has been declared.

'Moonbria Road Fire'

An out-of-control grass fire at Conargo, north west of Jerilderie has burnt through more than 2000 hectares of land.

The fire is burning in an easterly direction, close to the Newell Highway and motorists are advised to avoid the area.

The fire is not expected to impact on the township of Jerilderie but residents are advised to monitor the situation closely.

'Monkey top fire'

The Monkey Top fire near Naradhan, south of Lake Cargelligo has now burnt more than a thousand hectares.

Police doorknocked local residents yesterday warning them they could be evacuated.

The area is experiencing wind gusts of up to 80 kilometres an hour.

The fire is in hilly, inaccessible country and is burning within containment lines but there is a fear the wind will cause spot fires.

'Oura Fire'

A fire which has already burnt 900 hectares at Oura is continuing to trigger fears of ember attacks on nearby properties.

The Rural Fire Service has upgraded the fire to a 'Watch and Act' level due to increasing winds.

It is also considering sending emergency alert messages to residents in the nearby areas of Wantabadgery and Borambola.

'Cheviot Hills fire'

A watch and act alert has been issued for a fire burning near Livingstone Gully Road near Big Springs, about 15 kilometres east of Wagga Wagga.

The bush and scrub fire has burnt around 600 hectares and is under control.

'Umbango Fire'

There's also a Watch and Act alert in place for a bushfire burning 15 kilometres south of Tarcutta.

The blaze is near Oberne-Umbango Road and has burnt around 80 hectares.

Temperatures across the Riverina are now rising above 40 degrees.

'Shalvey Fire'

A Watch and Act alert has been issued for a deliberately lit fire near Blacktown in Sydney's west.

The scrub fire is burning at Roche Grove at Shalvey.

Fire fighters say the blaze has been brought under control.

'Advice'

The Rural Fire Service says fires under these conditions can be difficult to control.

Embers may be blown ahead of the fire, creating spot fires.

These spot fires may threaten your home earlier than the predicted main fire front.