Summarize this content to 2000 words in 6 paragraphs “What brings a heatwave is the warmer nights because you get no reprieve from the heat, which can affect vulnerable people,” Trainor said. “[On Sunday], the minimum is down to 23, and then it’s 25 Monday night.”Tuesday is expected to reach a high of 35 degrees but if a cool change doesn’t arrive until late in the day, it could deliver a record not seen in Melbourne for a decade: the first time the city has experienced three consecutive days of at least 37 degrees since 2014.The current heatwave across Victoria threatens to worsen existing fires in the Grampians as firefighters engage in back-burning to limit the spread.The Grampians blaze has burnt more than 110,000 hectares of terrain since it was ignited on December 17 by dry lightning strikes. Fires spanning about 36,000 hectares are still not under control.LoadingState Control Centre spokesman Luke Hegarty said there were concerns over conditions across the state.“We know that there’s potential for dry lightning across the state, and given that we had 10,000 strikes on Monday that hit the ground in Victoria, there’s that prospect of something similar happening,” he said.“Hopefully, we don’t see the winds that we saw on Monday, which means that we might have a chance of getting some crews onto any new fires that we see.”“The biggest concern we’ve got is the fact that with that heat, we don’t see the cooling-off overnight and not a lot of that moisture recovering. That’s something we would normally rely on, in a way, and that’s just not going to be there over the next few nights. Anything that does get itself established is potentially going to be a challenge over a number of days, just until the weather really backs off.”The Little Desert Fire – which scorched more than 70,000 hectares near the South Australian border – has been brought under control by firefighters, with one home lost.
