LANSING — Breathing normally may present challenges for Greater Lansing residents through July 14. The National Weather Service has issued a statewide air quality alert lasting Sunday, July 13, and Monday, July 14, due to Canadian wildfire smoke. MiAir said the Greater Lansing region can expect “moderate” air quality.

This week in the Boston Globe Weather Mailbag, Globe Weather HQ tackles questions surrounding summer thunderstorm frequency, the best weather reporting station, air quality categories, and the HAARP model, most commonly used in Aurora forecasting.

Delhi experienced its cleanest air in almost two years on Tuesday, as persistent rain and favourable wind conditions pushed the city's air quality into the 'good' category for several hours.

Under the influence of the rains, Dhaka, the overcrowded capital city of Bangladesh, has ranked 57th on the list of cities with the worst air quality with an AQI score of 55 at 9:25am on Monday. Dhaka’s air was classified as "moderate,

An air quality advisory that was set to last through Monday has been lifted, air district officials said. Over the weekend, smoke from the Butler and Green wildfires in the Sacramento Valley impacted air quality in parts of the Bay Area, according to the Bay Area Air District.