Weather

Newsweek -  In collaboration with local agencies, the National Weather Service (NWS) published air quality alerts for the following states as of Tuesday morning:

• California
• Colorado
• Texas
• Minnesota
• Wisconsin
• Michigan
• Indiana
• Ohio
• Pennsylvania
• New York
• Connecticut
• Vermont
• New Hampshire

Alerts spanned the entirety of Michigan and Wisconsin because of smoke from Canadian wildfires.

"The main culprit remains Canadian wildfire smoke, originating from the Manitoba and Ontario Provinces. The second culprit is a stubborn high-pressure cell planted over the Midwest which is holding the smoke in place and compressing it close to the ground," said a notice from the Michigan Department of Environmental Quality, which the NWS published.

"The weak clockwise winds will recirculate the worst of the smoke westward then northward, back into the western U.P., but the entire state will remain under hazy conditions during Tuesday," it continued.

Northeast Minnesota and eastern Pennsylvania were also affected by wildfire smoke, according to alerts for the regions.

Particle pollution—a product of wildfires—was also the cause of air quality alerts in Indiana, Vermont, New Hampshire and Colorado.

San Diego, in California, alongside Phoenix, Tuscon and Flagstaff, in Arizona, have all been issued extreme heat warnings by the NWS, while Las Vegas in Nevada has been put under an extreme heat watch.