Such a situation has forced government to order to close beaches, cancel shows, warn drivers for reduced visibility, recommend Americans to avoid staying outdoors and do exercises indoors.

The Washington D.C, issued code red for poor air quality, yet improved conditions are forecast for weekend.

The US meteorological services reported that two systems present in the northeast of the country as well as the wind direction created a favorable environment for the toxic haze to impact on the region.

Canadian environmental authorities said that wildfire season will continue there well above normal through September, and that about 250 wildfires are presently burning “out of control”.

The toxic haze hammering the United States has triggered air quality alerts for the states of New York, Iowa, Wisconsin, Illinois, Indiana, Michigan, Delaware and Maryland, as well as parts of Kansas, Missouri, Minnesota, Ohio, Pennsylvania, Virginia and North Carolina.

The PM 2.5 particulate matter being transported is a tiny but dangerous pollutant that when inhaled penetrates deep into lung tissue and bloodstream, the Centers for Disease Control and Prevention (CDC) reported.

Health issues including asthma, heart disease and other respiratory conditions are linked to the effect of these particles.

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