Also, all construction activities have been ordered to be suspended for at least a week to reduce air pollution which has reached 'severe' level.
District information officer R B Singh said District Magistrate Ritu Maheshwari has ordered that primary sections of all schools (up to class 5) be closed for two days from tomorrow.
She also ordered builders, the Ghaziabad Development Authority (GDA) and the civic body to stop all construction works for at least a week, Singh said, adding hot mix and stone crushers plants too have been ordered to suspend operations for the same period.
Sprinklers are being used to spray water on the roads to settle down the dust.
Transport department and traffic police have been ordered to take action against vehicles flouting pollution control norms.