India, Dec. 19 -- Dense fog enveloped Gautam Budh Nagar and neighbouring Ghaziabad on Thursday morning, prompting the India Meteorological Department (IMD) to issue an "orange alert" for the districts, warning of "very low" visibility that could disrupt road, rail and air traffic.

According to IMD's district-wise nowcast, visibility dropped to as low as 200 metres in parts of the region, while fog conditions stretched across Haryana, Delhi, Uttar Pradesh and Bihar. At Delhi's IGI airport, visibility at 9am was reported at around 200 metres, meteorological experts said.

IMD data showed Gautam Budh Nagar recorded a maximum temperature of around 25degC and a minimum of 11.2degC on Thursday, while Ghaziabad logged a maximum of 24.3degC and ...