Defender Rob Holding and striker Eddie Nketiah rounded out the scoring in the dying minutes as a rampant Arsenal more than made up for a disappointing penalty shootout defeat to Atletico Madrid in the tournament opener on Thursday.
Asked if the heat was an issue, Emery told reporters: "No".
The Gunners are now in Singapore, where they will take on French giants Paris Saint-Germain in a friendly on Saturday. They have addressed the problems in the squad, signing a proper defensive midfielder, a back-up right back and a centre-back, as well as a young, actually good goalkeeper. First, I want to work with every player, and they are coming.
"Their quality on the ball was too high".
Most of PSG's senior squad remains absent due to their World Cup exploits, whereas Arsenal were almost at full strength and a prickly Tuchel wasted no time in pointing to that disparity.
"Yes, clearly", he said.
PSG on the other hand featured a lot of youngsters with notable absentees being Neymar, Kylian Mbappe and Edinson Cavani - all of which played in the 2018 World Cup.
Although PSG's starting XI was packed with young players, they enjoyed a far greater start and nearly made the most of their early pressure - Azzeddine Toufiqui sending a curling left-footed effort just wide from 20 yards after a brilliant marauding run from Adrien Rabiot.
It was a good match no doubt between both teams.It gave the fans the opportunity to discover some exciting talents that abound in both teams.The stars of the near future.That's what the Pre-season is all about.
"I am thinking about Petr, Aaron and Mesut".
"Everyone loves the game and we all want to see the best players, but let them rest as they are the guys that are the show - not us coaches".