 Current air quality levels fall between 51 and 100 on the Air Quality Index. A large smoke plume is expected to pass through Connecticut today. Ground-level ozone pollution also been a big concern this week due to recent high temperatures and the sunny weather. Severe thunderstorms hit Connecticut Wednesday evening, causing power outages for thousands. Eversource reported nearly 1,900 outages, most of them in Westport, Greenwich, and in Danbury, while a United Illuminating had 1,000.