Sydneysiders have tossed and turned through a hot summer night with temperatures in the city not dropping below 28C.
At 6am on Wednesday the mercury was sitting at 31.2C in the city with temperatures expected rise to 37C.
In Sydney's west temperatures dropped to the low-20s overnight, with the weather bureau predicting searing temperatures during the day with some suburbs reaching 42C.
Short-term relief is on its way, with a cool southerly change predicted at about midday on the coast and about 3pm in the western suburbs.
"We do have a southerly change on the way, so we'll see cooler conditions for southern parts of the state (on Wednesday)," Bureau of Meteorology spokeswoman Sarah Chadwick said on Tuesday.
Milder conditions will give residents some relief on Thursday, with a maximum of 25C in the city and 27C in the west, but the temperature is due to climb back up again on Friday.
Similar conditions are expected next week, with experts warning no lasting relief is in sight any time soon.
With the recent run of hot days, water consumption has also rocketed with Tuesday becoming the second-highest single day in the demand for water in the past 14 years.
"Yesterday's demand of 2.116 billion litres was just below the December 2016 maximum day of 2171Ml which was the highest single day demand since February 2003," Peter Hadfield, Senior Media & Public Relations Advisor said on Wednesday.
Wednesday could experience a similar water demand to Tuesday, he said, depending on the cool change and predicted storm activity.
