Schools were closed indefinitely and some coal-based power plants shut down as the smog-shrouded Indian capital and neighboring states invoked harsh measures Wednesday to combat worsening air pollution after an order from the federal environment ministry. The measures come as India’s top court is deliberating whether New Delhi should go into a lockdown as a blanket of thick, gray smog continued to envelope the city, particularly in the mornings. The panel issued the guidelines on Tuesday night to stem the pollution and to show residents that the government was taking action to control an environmental crisis that has been plaguing the capital for years. Read: Dhaka’s air quality still ‘unhealthy’ Besides the closure of schools, the Commission for Air Quality Management ordered a stop to construction activities until Nov. 21 and banned trucks carrying non-essential goods. The panel also directed the states to "encourage" work from home for half of the employees in all private offices. Despite some improvement in New Delhi air over the past two days, readings of dangerous particles Wednesday were still as high as seven times the safe level, climbing above 300 micrograms per cubic meter in some parts of the city. The World Health Organization designates the safe level for the tiny, poisonous particles at 25. Forecasters warned air quality would worsen before the arrival of cold winds next week that will blow away the smog.