PA Heat Wave Sets Nearly 2 Dozen New Records: NWS

PENNSYLVANIA — Last week's punishing heat wave brought days of muggy, sweltering conditions to Pennsylvania and broke nearly two dozen temperature records in cities across the tri-state area, according to forecasters.

Between nine National Weather Service climate sites, forecasters recorded 20 broken or tied record high temperatures or record high low temperatures between June 19 and June 23.

Here's the full list of where new records were recorded, according to the NWS:

New Record High Temperatures

• Allentown, PA (June 22 and June 23)
• Philadelphia, PA (June 23)
• Reading, PA (June 22 and June 23)

New Record High Low Temperatures

• Reading, PA (June 22 and June 23)
• Trenton, NJ (June 22)
• Wilmington, DE (June 23)
• Atlantic City Airport, NJ (June 22 and June 23)
• Mount Pocono, PA (June 22 and June 23)

Record High Temperatures (Ties)

• Reading, PA (June 19)
• Atlantic City Airport, NJ (June 23)

Record High Low Temperatures (Ties)

• Mount Pocono, PA (June 19)
• Allentown, PA (June 23)
• Reading, PA (June 19)
• Philadelphia, PA (June 22)
• Trenton, NJ (June 23)

New Jersey got a long-awaited break from the heat Monday when temperatures returned to the mid-80s throughout most of the state; however, the reprieve wasn't expected to last long.

Temperatures are expected to spike again Tuesday with highs potentially reaching the lower 90s.

• RELATED: Severe Storms, Tornado Risk, Heat All In Latest Eastern PA Forecast

On Wednesday, a heat advisory will be in effect from 9 a.m. to 9 p.m. for parts of the Delaware Valley, according to the National Weather Service. Counties affected include Delaware, Philadelphia, Chester, Montgomery and Bucks.

On Wednesday, temperatures could reach the mid- to upper 90s with heat index values nearing 100, according to NWS forecasters. Storms could also develop Wednesday afternoon, forecasters said. The primary threats are damaging winds, localized flooding and tornadoes.