The high in Omaha on Thursday was 92 degrees with a heat index of 103.
The Weather Service projects 123 record warm low temperatures to be tied or broken. "The combination of hot temperatures and high humidity will combine to create a unsafe situation in which heat illnesses are likely".
Heat advisories and warnings affect 154 million Americans.
Saturday, July 20 will be even hotter, with a high temperature around 95 degrees and plenty of sunshine.
Most existing record (daytime) high temperatures for the region should hold, except perhaps at Dulles where records have only been maintained since 1963 (in Washington and Baltimore, records date back to the 1870s).
Dew point temperatures, which are a measure of the amount of water vapor in the air, have climbed well into the oppressive humidity category.
Temperatures in Northeast Ohio are expected to hit the mid-90′s on Friday and Saturday, but how can you tell when the heat is becoming unsafe? Heat is typically the No. 1 weather killer in the US each year, and heat-related illnesses spike when overnight lows stay warm, depriving the human body of a break from heat stress.
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The groups most vulnerable to heat-related illnesses include the elderly, chronically ill, children and outdoor workers.
Temperatures are expected to reach the upper 90s Friday and Saturday, according to the National Weather Service.
If you lack air conditioning, stay on your lowest floor, out of the sun.
Along the northern periphery of the heat dome will be what meteorologists refer to as the "Ring of Fire".
If there are power outages during warm weather, take additional precautions or go to a cooling center or emergency shelter to stay cool. Temperatures will likely even be a bit below average for a chunk of next week!
The dog days of summer are here.
Climate change attribution studies have shown that global warming has dramatically increased the likelihood of extreme heat events. And to show just how serious the threat is, the National Weather Service in Omaha Nebraska baked biscuits in a parked auto - using only the heat of the sun.