United States Heat Wave
United States Heat Wave earthobservatory.nasa.gov

A large portion of the East Coast has been hit by a heat wave that will expand upward and move north over the weekend, potentially shattering records.

Extreme heat has started moving eastward from the mid-Atlantic region of the U.S., and temperatures will easily soar into the mid-upper nineties over the weekend, according to the National Weather Service.

High temperatures coupled with high humidity levels are expected to break many records across the U.S. over the weekend.

In terms of humidity, today will see the highest levels of the next three days. One of the reasons the humidity will not be as bad, that storm which hung around for so long is going to force a bit of drier air around itself and spin it over us for Saturday and part of Sunday, Meteorologist David Epstein wrote in an blog post.

Hundreds of heat records have already been broken as the heat wave moved from Montana to Louisiana on Friday, according to the Associated Press. The weather conditions have also added fuel to the devastating wild fires blazing across Colorado Springs.

Overnight on Friday, temperatures are not expected to drop below the seventies. Scattered showers and thunderstorms will hit the northern central plains and move eastward into the Ohio Valley and mid-Atlantic region, the Nation Weather Service reports.

The Weather Channel forecasts the following cities to hit the 100 degree mark this weekend:

St Louis, Missouri topped the 108 degree mark, setting a new record high for June. Temperatures are forecast to remain in the upper 90s and 100s over the weekend.

Louisville, Kentucky hit 103 degrees on Thursday. Temperatures are expected to surge even higher over the weekend.

Nashville, Tennessee peaked at 105 degrees on Friday, but temperatures are forecast to stay in the three-digit category over the weekend.

Atlanta, Georgia has spent the past nine days in the 100s. It's been almost five years since Atlanta officially recorded a 100-degree reading.

Asheville, N.C. hasn't hit the 100s since 1876, but it is expected to hit 100 degrees this weekend.

Raleigh, N.C. usually hits 90-plus highs in June, but this weekend it is expected to flirt with its record of 104 that was set in 1954.

Washington, D.C.'s highs are expected to top the 100s through Saturday and could break last year's record of 102 degrees.