Argentina's government introduced emergency measures to limit cash withdrawals from banks.
Mr. Gorbachev today renewed warnings he has made since last March that he is willing to introduce emergency measures where necessary to stop disorders.
On Wednesday rail user groups and one MP called for the Department for Transport to introduce emergency measures to restore a reliable service.
Beijing's government on Wednesday introduced emergency measures to curb pollution, ordering cars off the roads and factories to shut down, and warning citizens to avoid activity outside.
With fears of a breakdown in public order, governments introduced emergency measures.
So far, though, Delhi's government has made no announcements about the city's air pollution, nor introduced any emergency measures, a spokesman for chief minister's office said.
"I don't think we are going to have to introduce so called emergency measures such as road closures and that kind of thing," Johnson said.
May introduced a number of emergency measures to tackle the backlog, which is now around 80,000.
Emergency measures introduced in Paris to halve the number of vehicles on the roads after a noxious smog descended on the French capital have been hailed as a success.
In October, Beijing introduced a system of emergency measures if pollution levels remained hazardous for three days in a row, including closing schools, shutting some factories, and restricting the use of government cars.
