Karratha has just had its hottest November day on record.
The temperature reached 44.8 degrees just after 11:30am (AWST) yesterday.
The reading exceeded Karratha's previous hottest November day of 44.4 degrees, recorded in 1994.
In Roebourne, Marble Bar and Mardie the mercury peaked at about 46 degrees but no records were broken there.
The Bureau of Meteorology's Daniel Hayes says it reached about 39 degrees in Port Hedland.
"It will be a little bit cooler today, there is a bit of cloud about which ... should keep temperatures a little bit cooler at least in parts but still going to get to 42 degrees for Paraburdoo, 41 for Marble Bar but 35 at Exmouth and quite a few high 30s throughout parts of the Pilbara, particularly around the coastal parts," he said.
© ABC 2013
00:33 EDT Severe thunderstorms and damaging winds caused chaos across Sydney on Sunday, with the SES responding to more than 550 jobs, mainly roof damage from heavy rain and strong winds.