Sydney reached 32.1 degrees on Saturday afternoon, and within two hours a westerly change pushed a 113 km/h gust through Penrith and 89 km/h across the harbour, bringing down trees from the Blue Mountains to the Hawkesbury and cutting power to 62,256 Endeavour Energy customers. By Monday morning 2,103 of them were still without supply.

The Bureau of Meteorology's observations put the heat first and the wind straight after it. Richmond reached 32.8 degrees at 2.33pm, Sydney Airport 32.2 and Observatory Hill 32.1 at 2.30pm. The change arrived at Penrith at 3.52pm with a 113 km/h gust, the highest the Bureau recorded in the basin. Mount Boyce in the Blue Mountains and Kurnell both gusted to 93 km/h, Sydney Airport to 96 km/h at 4.15pm and Fort Denison, in the harbour, to 89 km/h at 4.30pm. On the ranges, Moss Vale and Cabramurra reached 104 km/h and Thredbo Top Station 115 km/h at midday.

Sydney had not seen 32 degrees this early in the season before, according to Weatherzone's analysis of Bureau data going back to 1859. The previous earliest was 13 September, in 2009 and 2017. The Bureau itself has not published a record statement, and September's daily observations for Sydney show no rain on any day so far this month.

Endeavour Energy reported the outage peak of 62,256 customers at 5pm on Saturday. Crews had restored 42,864 customers by 7am Sunday, with help from Evoenergy crews sent from Canberra, and at 4.45pm Sunday the company said it expected to have 90 per cent back by 10pm, with 356 separate faults still to repair. "Endeavour Energy crews remain deployed in large numbers, with all available resources focused on restoring power to the remaining 2,103 customers as quickly and safely as possible," the company said in its Monday morning update.

The Blue Mountains took the worst of it. A gum tree fell on a house in Kent Street, Winmalee, and the Blue Mountains Gazette reported that occupants were injured. Another tree came down on the roof of Springwood police station and damaged a police vehicle. NSW SES Blue Mountains incident controller Andrew Mitchell said on Sunday: "We have deployed seven teams of volunteers over the past 24 hours, responding to 105 calls for assistance."

The Bureau cancelled its severe weather warning for southern NSW and the ACT at 4.41am on Sunday. "Damaging winds have eased over southern parts of NSW and southern ACT," it said. "No further warnings will be issued for this event." No land-based warning was current for NSW on Monday. A strong wind warning issued at 11.54am Monday covers the Hunter, Sydney, Illawarra, Batemans and Eden coasts and Sydney's enclosed waters until midnight Tuesday, with the Macquarie Coast added on Tuesday.

The state forecast issued at 4.20am Monday has a high pressure ridge building from the west. A gusty southerly change was due along the southern and central coasts on Monday afternoon and evening, with snow above 1800 metres. Tuesday is forecast dry with light winds and below-average temperatures, and Wednesday sunny with frost on elevated ground. Sydney's maximum on Sunday was 23.9 degrees and Monday's minimum 13.2.

The next Bureau marine summary for NSW is due by 4.05pm Monday. Endeavour Energy's restoration updates are on its live incident page.