He thinks it has to do with muggy air + high heat + complex sewer systems with air captured in them due to the storms and humidity.
Well, if he thinks the government would use reliable early warnings to "set off alarms for the citizens"... then bless his heart. As for the following links, you might be interested in the reading - he probably won't. They are neither peer-reviewed nor accepted by mainstream geologists. In fact, they actually rely on eye-witness reports from... people.
Air quality is NOT bad: Air Quality Map