Air quality is showing signs of improvement. However, one region still has unhealthy air, with the 24-hour PSI reading above 101. This region is the central area, where the PSI has remained elevated.
Further information on the current air quality situation is available from the source. The details provided indicate that the central region is the only area still experiencing unhealthy air quality.
The PSI reading is a key indicator of air quality, and a reading above 101 is considered unhealthy. For the most up-to-date information, readers can refer to the source for more details.