It follows the news Bega had its highest mean daily maximum temperature for spring out of 27 years of records; the average is 21.9 degrees Celsius, but this year it reached 23.8.

The Bureau of Meteorology has predicted the heatwave will arrive in the region on Tuesday, with conditions expected to begin to ease in the Bega Valley on Thursday.

Weatherzone said temperatures in Bega were predicted to reach 35 degrees Celsius on Wednesday before declining then bouncing back to the mid-30s again on Saturday.

READ MORE: No water restrictions for Bega district, yet

In Merimbula, temperatures will reach 31 degrees on Thursday before declining, then increase back to the low-30s on Saturday.

BOM defines a heatwave as three or more days in a row when daytime and night-time temperatures are unusually high, in relation to the local long-term climate and the recent past.

Severe heatwaves are not as frequent as low-intensity heatwaves and are challenging for vulnerable people such as the elderly and particularly those with pre-existing medical conditions.

BOM stated 2019's spring was the driest as well as the fifth-warmest on record for Australia.