Thunderstorm Warning Issued. Flooding remains a hazard. Avoid flooded roads and waterways 
Please seek shelter.
Philadelphia and the surrounding counties have already received a large amount of rain over the past few days, including 4 inches overnight.
This caused waterways in our area to rise. Be aware of your local streams and creeks and do not approach. Flood water is murky, moves quick, and you cannot tell how deep it may be.
Check National Weather Service Water Gauges for your local waterway: https://water.weather.gov/ahps/
Since the region has experienced large amounts of rain over the past days, the ground is saturated. Water may run-off into streets and cause ponding or flooding, especially with large amounts of precipitation during a short period, overwhelming sewers.
Be aware of street ponding or flooding when traveling and use caution. Never drive through flood water or around a barrier.
* At 232 PM EDT, severe thunderstorms were located along a line extending from Lionville to Kemblesville, moving east at 30 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is possible.
* Locations impacted include...
Philadelphia, Wilmington, Newark, West Chester, Norristown,
Chester, Phoenixville, West Norriton, East Norriton, Pennsville,
Coatesville, Yeadon, Westtown, Carneys Point, Downingtown,
Conshohocken, Hatboro, Folcroft, Ambler and Swarthmore.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a building.
In addition to damaging winds, frequent cloud to ground lightning is occurring with these storms. Move indoors immediately. Remember, if you can hear thunder, you are close enough to be struck by lightning.
Torrential rainfall is occurring with these storms, and may lead to flash flooding. Do not drive your vehicle through flooded roadways.
Address/Location
Philadelphia Office of Emergency Management
240 Spring Garden St
Philadelphia, PA 19123
Contact
Emergency: 9-1-1