Beloved mum Jessica was in a car when it was struck during the chase on Thursday night.
Despite paramedics’ efforts, she died at the scene.
Her husband Andrew Michael paid tribute to her on Facebook, writing that he would “love her forever”.
Mr Michael wrote: “No words. Love of my life.
“I hope I make you proud till I see you again.”
An Essex Police spokesman said the death had been referred to the Independent Office for Police Conduct (IOPC).
He added: “It followed a police pursuit involving one of the cars, which officers from the Bedfordshire, Cambridgeshire and Hertfordshire road patrol unit had attempted to stop on the M25.”
An IOPC spokesman said: “We are independently investigating the circumstances of a police pursuit before a fatal road collision in Waltham Abbey last night.
“The car being pursued was then involved in a collision with two other cars in Parklands.
“A woman in one of the cars was sadly pronounced dead at the scene and a number of other people in the vehicles were injured.
“Sadly despite our best efforts one patient died at the scene”
East of England Ambulance Service spokesman
“After we were notified by Hertfordshire Police we sent investigators to the scene and told the police post-incident procedure to begin gathering evidence.”
An East of England Ambulance Service spokesman said: “We were called at 9.59pm yesterday (Thursday) with reports of a collision in Parklands, Waltham Abbey.
“We sent two ambulances, a rapid response vehicle and an ambulance officer. Three people were taken to Princess Alexandra Hospital for further treatment.
“Sadly despite our best efforts, one patient died at the scene.”