Topline

Cities across the northeast US are projected to either meet or break daily high temperature records Thursday as heat wave engulfs the region and puts millions of people under heat advisories.

Key Facts

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The National Weather Service projects Boston could hit the middle and upper 90s on Thursday, which would break the heat record from 1928, when a temperature of 96 degrees was recorded in the city.

Philadelphia‘s forecasted high for Thursday is 98 degrees, which would tie the daily record set in 1995.

HartfordConnecticut, could get as hot as 101 degrees, which would break the daily record high temperature of 96 degrees set in 1944.

If AlbanyNew York, hits 97 degrees as projected, it will be a single degree short of the daily record set in 1955.

Newark, New Jersey, is also projected to reach up to 99 degreesapproaching the 1993 record of 100 degrees.

Big Number

73 million. That's how many Americans are under heat alerts Thursday, according to NBC.

Key Background

Thursday's record-breaking projections are the latest in a string of worldwide heat waves this summer. Higher-than-average temperatures have been recorded across the US, Europe and Asia. Climate change is a major factor in the increasingly hot summers, experts say. Late last month amid another wave of high temperatures across the country, President Joe Biden announced he would take executive action on climate change, which he said was "an existential threat" to the US and the rest of the world.

Sunday Heat Wave Scorches These US Cities From St. Louis to New York (Forbes,

Week Of Heat: These Major Temperature Records Were Shattered In Scorching Heat Waves (Forbes,

Heat Wave Watch: Here's Where It Will Be Dangerously Hot In The US This Week (Forbes,