Monday and Tuesday of this week were declared the two unofficial hottest days in human recordkeeping, according to University of Maine scientists at the Climate Reanalyzer project.

Meteorologist Kaylee Wendt joined anchor Marisa Jacques to discuss what temperatures looked like across New York and the nation earlier this week.

Temperatures are expected to rise even higher in parts of the state, with heat advisories in place for many areas, including counties along Lake Ontario, Central New York and the Capital Region from 11 a.m. to 8 p.m. Thursday.

The global daily average temperature for July 3 came in at 17.01 degrees Celsius or 62.6 degrees Fahrenheit, according to the University of Maine's Climate Reanalyzer, a common tool often used by climate scientists for a good glimpse of the world's condition. 

This average temperature may not seem that hot, but it's the first time in the 44 years of this dataset that the temperature surpassed the 17-degree Celsius mark.

Hotter global average temperatures translate into brutal conditions for people all over the world. In the U.S., heat advisories are in effect this week for more than 30 million people in places including portions of western Oregon, inland far northern California, central New Mexico, Texas, Florida and the coastal Carolinas, according to the National Weather Service Weather Prediction Center. Excessive heat warnings are continuing across southern Arizona and California, they said.

And when the heat spikes, humans can suffer health effects.

The Associated Press contributed to this report.