Hot enough to bake cookies! Heatwave rages across the US

The heatwave engulfing much of the US this weekend is reaching temperatures hot enough to bake cookies in a car.  

One Wisconsin newscaster put the heat to the test, placing raw cookie dough on a baking sheet in his car with a thermometer. 

The car reached 170 degrees - hot enough to begin baking the cookies - serving as a warning to parents and pet owners. 

Forecasters are calling this a 'heat dome' with 18 states having already issued heat advisories through the weekend and into the week as afternoon highs are expected to be 10 to 20 degrees above normal. 

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Record breaking temperatures are so high around the US, one Wisconsin newscaster was able to bake cookies in his car

Record breaking temperatures are so high around the US, one Wisconsin newscaster was able to bake cookies in his car

The temperature in his car hit 170 degrees, which serves as a warning to parents and pet owners 

The temperature in his car hit 170 degrees, which serves as a warning to parents and pet owners 

JUNE 30: On Saturday 100+ temperatures hit several cities including Las Vegas, Dallas and San Antonio while the heat wave continues to push into the northeast

JUNE 30: On Saturday 100+ temperatures hit several cities including Las Vegas, Dallas and San Antonio while the heat wave continues to push into the northeast

JULY 1: By Sunday areas of the northeast will experience temperatures in the upper 90s

JULY 1: By Sunday areas of the northeast will experience temperatures in the upper 90s

Saturday, thousands of organizers across the country protesting the Trump administration's 'zero tolerance' policy baked in the heat. Organizers are pictured in Los Angeles

Saturday, thousands of organizers across the country protesting the administration's 'zero tolerance' policy baked in the heat. Organizers are pictured in Los Angeles

The National Weather Service says: 'An Excessive Heat Warning is issued when the combination of heat and humidity is expected to make it feel like it is 105 degrees or greater.   

Saturday, thousands of organizers across the country protesting the administration's 'zero tolerance' policy baked in the heat. 

The crowds in Washington DC included celebrities who withstood 96 degree weather.  

A dangerous heatwave reached the Midwest on Friday as it makes its way east, promising a long stretch of sweltering temperatures leading up to the Fourth of July next week.

Denver reached 105 degrees on Thursday, marking an all-time high that has only occurred once in 2012. 

From Texas to Wisconsin, states are reporting heat index values of over 100 degrees. Cities such as Des Moines, Chicago and St. Louis will even see 110 degrees heat index values.

The heat will be so ghastly in New York City that residents could expect an increase in the number of cockroaches that make their way inside apartments.

The heat wave is a result of surges in heat and humidity combining with light winds, according to Accuweather. 

Forecasts indicate that the wave will reach its peak over the weekend and into the beginning of next week. 

JULY 2: The heat wave is expected to persist into the beginning of the week with high heat and humidity across the US on Monday

JULY 2: The heat wave is expected to persist into the beginning of the week with high heat and humidity across the US on Monday

JULY 3: The mercury is expected to drop slightly on Tuesday in many areas of the country

JULY 3: The mercury

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