The draw for the first Test between Pakistan and West Indies in Multan on Friday was delayed due to poor visibility as air quality monitors recorded high levels of pollution.
Pakistan regularly suffers from winter smog, which has serious health consequences.
“Visibility has been affected due to fog due to which the toss has been delayed,” the Pakistan Cricket Board said in a statement.
“Once visibility improves, the two referees will inspect the conditions.” An inspection of the pitch was scheduled for 09:30 am (04:30 GMT).
Air quality in Multan was “unhealthy for sensitive groups” and would increase throughout the day, according to monitoring site IQAir.
The two-match Test series is part of the third cycle of the World Test Championship (2023-2025) in which Pakistan are ranked eighth and West Indies ninth and last.
The second test begins on January 25, also in Multan.
