Following are highlights of what is happening across Australia:
* Temperatures topped 113 degrees in much of the Sydney metropolitan area, with Penrith recording a high of 120 according to the BOM. Canberra, the national capital, recorded a temperature of 111.2 just after 4 p.m., which the chief minister said was a record for the territory.
*As the fires have flared, many towns have been isolated as major and minor roads are closed. Some fires are generating their own storm systems, which create the risk of lightning strikes generating new fires.
* A late southerly wind change on Saturday dramatically lowered temperatures, but also brought wind gusts of 43-50 miles per hour that caused some major fires near the border of Victoria and New South Wales states to merge and strengthen.