The city's public transport system has many strict rules and regulations in place to ensure that everyone can have a safe and enjoyable journey
Sarri previously coached Higuain at Napoli when he scored a Serie A record 36 goals in a league campaign in 2015/16.
That sort of goalscoring prowess is what Chelsea have been badly missing in recent months, with Sarri's lack of confidence in Alvaro Morata and Olivier Giroud forcing Eden Hazard into an unfamiliar centre-forward role.
"They're a few hours into signing a contract today," Sarri said.
Chelsea play Tottenham in Thursday's League Cup semifinal second leg at Stamford Bridge, bidding to overturn a 1-0 deficit to reach the February 24 final.
The Blues had until 1200 GMT to register Higuain for the match, but Sarri says "it's impossible" for the Argentina international to feature.
Higuain has been on loan at AC Milan from Juventus this season, scoring just once in his past 12 appearances for the Rossoneri.
"We hope he'll bring goals, he'll start scoring for us," Sarri said.
"It's very difficult in January to find one of the most important strikers in the world. So I think the club is working very well because it's not easy to get a new striker."
Sarri criticised his players following last Saturday's Premier League loss to Arsenal, saying his group of players were difficult to motivate.
Asked about the response from his players this week, he said: "I think we need to react on the pitch. The rest is nothing.
"We discussed with the players how to try to improve the approach, the motivation, the determination, so we are trying to change something in training, in pre-match, in everything. I think we all have to react on the pitch, of course."
The city's public transport system has many strict rules and regulations in place to ensure that everyone can have a safe and enjoyable journey
Palestinian Ambassador to UNESCO Monir Anastas said the 'inscription is a message of hope to our people in Gaza, who are fleeing bombs with no shelter, no food or water'
The said delays are expected between the intersection of Hatta Road and Al Ain Road towards Abu Dhabi
Veerendra Kumar said he was cheated by a job agent who had promised him a job in Qatar but sent him to Saudi
The government authority announced the road closure on social media platform X
Around 800,000 passengers are expected to be affected over the weekend as the damage is heavy and labour-intensive to repair
A total of 17 candidates secured the All India Rank (AIR) 1 as per the final results while earlier the number was 67
Authority said the exercise will involve movement of military vehicles and urged residents to stay away from designated areas