Continuing hot weather has prompted the Bay Area Air Quality Management District to call another Spare the Air alert for Wednesday, air district officials announced Tuesday afternoon.
The hot weather combined with light winds are expected to lead to more smog from vehicle exhaust, so residents are encouraged to walk, bike, take public transit or carpool in an effort to reduce pollution.
The air district called the season's fifth Spare the Air alert for Tuesday and another for Wednesday.
The heat wave is forecasted to persist throughout the week, so more Spare the Air alerts could be coming.
In addition, the Campbell Union High School District announced Tuesday that the school day will be shortened at its eight schools on Wednesday and Thursday due to the extreme heat advisory. Students will be dismissed at about 11:30 a.m. and no outside activities will be permitted, officials said.
Smog can lead to health hazards like throat irritation, congestion and chest pain. People suffering respiratory conditions like asthma, bronchitis or emphysema could have their conditions aggravated, according to the air district.
In all, 1996 had the most number of Spare the Air alerts with 25 issued that year, 1995 had 24 alerts issued and 1993 had 19 alerts.
In 2014, there were 10 alerts in all.