
PHILADELPHIA (WPVI) -- An Extreme Heat Warning has been issued for the core of the Philadelphia area Wednesday, with heat index values climbing to the triple digits.
It goes into effect at 10 a.m. and lasts until 8 p.m. on Wednesday.

The latest heat warning comes as crowds will once again be flocking to FIFA Fan Fest at Lemon Hill for the World Cup semi-final matchup between England and Argentina.
There are misters, fans, and water bottle filling stations to help people keep cool in the final stretch of the World Cup.
There is no soccer on Thursday and Friday, but the festival's free concert series will continue with Canadian DJ and producer deadmou5 and Grammy-winning pop star Bebe Rexha.
The third-place game will take place on Saturday, and the final is on Sunday.
In light of the extreme temperatures, SEPTA and Amtrak will be implementing heat protocols as trains may need to operate at reduced speeds.
SEPTA Regional Rail riders were told they may experience delays.
Amtrak alerted customers that there could be delays between 11 a.m. and 7 p.m., from Wednesday through Friday. Amtrak already made some service adjustments and notified impacted customers.
Along Kelly Drive, runners fit in a workout before the sun came up.
"Today, just started a little bit earlier. Trying to get out before the heat -- the sun comes up. So, you know, just an easy six-mile loop around Philly, up the Schuylkill trail, up to the top of the Oval here, and then just right back down. A little slower though," said Liam Cullen of Center City.
"It's super humid so we usually go out a little closer to five, but because of the humidity went out around 4:45 today. It's to the point where you almost just have to walk- it's just so hot. The air is thick. Definitely not my best run- that's for sure," remarked Bernadette Fulweiler of Fairmount.