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A massive heat dome that has already set dozens of high temperature records Friday has its sights set on scorching more than 30 states with potentially deadly heat during the first SUMMER WEEK .
The extended area of high pressure began to whip across the plains Thursday and Friday, breaking several heat records in Colorado , Rapid City , South Dakota and parts of Nebraska . Denver matched its record high of 37 °C on Friday, while Pueblo reached 39 °C.
Heat kills more Americans than floods, tornadoes, hurricanes or lightning...
Dangerous heat to spread to the northeast next week
As the heat dome spreads eastward, it will cast a wide net over more than half of the country, causing potentially deadly temperatures.
This weekend, the heat will extend across the Midwest and into the Great Lakes, where highs will rise 10 to 20 degrees above average.
By Sunday, more than 200 million Americans will experience temperatures of 32 °C or higher, with various heat alerts spanning from Colorado to Maine. The high humidity with dew points reaching 21°C or even near 27°C, will push the wind chill well above 38°C in cities such as Chicago, Louisville, Cleveland, Nashville and Raleigh.
High humidity will also lead to warm nights, offering little relief from daytime temperature extremes.
In the Northeast, widespread heat alerts are in effect through Wednesday as temperatures are forecast to soar to levels not always seen during the month of June.
Extreme heat alerts - the National Weather Service's most severe heat warning - extend from Philadelphia up the Atlantic coast through New York City to Boston. Pittsburgh and parts of West Virginia are also under similar alerts so far.
Triple-digit temperatures are forecast for New York City , Washington, DC, Philadelphia and Hartford , Connecticut on Tuesday.
New York City and Philadelphia have not reached 100 degrees in any month since 2012. In New York City, the temperature had only reached 100 degrees in June three times before, most recently on June 27, 1966. In Philadelphia, it has occurred 10 times before, most recently on June 15, 1994.
From the Gulf Coast to Massachusetts, heat indexes will also exceed 100 degrees, which is dangerous for those working or playing outdoors without adequate hydration or cooling options.
