Pennsylvania, 2002

Heat in Pennsylvania, August 11 to 20, 2002

August 11 to 20, 2002 · NWS PHI · 10 events in 10 counties and zones

The longest run of days with high temperatures of 90 or greater this summer occurred across Eastern Pennsylvania from the 11th through the 20th. This was the longest heat wave for the state since the twelve day heat wave during the summer of 1999.

Where it happened

Every event with a place to put it; 7 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

Open the live radar over this ground

The toll

Deaths
8
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
10

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS PHI wrote it up.

The longest run of days with high temperatures of 90 or greater this summer occurred across Eastern Pennsylvania from the 11th through the 20th. This was the longest heat wave for the state since the twelve day heat wave during the summer of 1999. It also solidified August and the summer of 2002 as one of the ten hottest summers on record. Along with the heat came the humidity. The hottest weather occurred for most places on the 13th and 14th. A couple of weak cold fronts dissipated as they tried to cross the state during this heat wave. The only effect was to keep temperatures and humidity levels from getting any higher from the 15th through the 20th. A stronger cold front moved through the state on the 20th and ended the run of hot weather. PECO Energy set a new usage record. There were eight additional heat related deaths in the city of Philadelphia during this hot spell. This brought the city's heat related death total to 34. A 20-month-old toddler died after her grandfather accidently left her in his car for eight hours. The thirty-four heat related deaths was lower than similar hot summers during the early and mid 1990s. Thousands of acres of flat roofed attached housing can be turned into ovens during hot summers in urbanized areas. On days when excessive heat warnings are in effect, the Philadelphia Health Department issues heat alerts and coordinates an active heat outreach program to the elderly and homeless. Six thousand block captains are notified and asked to check on elderly neighbors. A heat hot line is activated to answer questions. The city contracts with Project Home, a private outreach program that provides water and support to the city's homeless. Group living homes are also required to keep room temperatures below 81 degrees. Most of the heat relate deaths, even those that perished during this heat wave, occur to the poor and isolated elderly. They tend to live in high crime and abandoned neighborhoods. Fear of crime keeps their windows and doors shut. Highest temperatures included 100 degrees in Reading (Berks County), 99 degrees in Stroudsburg (Monroe County) and the Philadelphia and Lehigh Valley International Airports, 98 degrees in Doylestown (Bucks County) and 97 degrees in Pottstown (Montgomery County).

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Philadelphia/Mount Holly wrote its last area forecast discussion before the first event at Aug 11, 10:00 AM EST, 1 hour earlier.

Area forecast discussion, Aug 11, 10:00 AM EST, 1 hour before
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1100 AM EDT SUN AUG 11 2002

MINOR UPDATE TO ZONES...MAINLY TO ADJUST A FEW TEMPS THIS AFTN.

.PHI...NONE.

KRAUS

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

10 heat. Local standard time, as filed.

Heat, Berks

When
August 11, 11:00 AM EST to August 20, 11:00 PM EST
Where
Berks forecast zone
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
40.416, -75.926 (the zone’s center; the record gives no point)

Heat, Bucks

When
August 11, 11:00 AM EST to August 20, 11:00 PM EST
Where
Bucks forecast zone
Reported by
AWOS,ASOS,MESONET,ETC

Heat, Carbon

When
August 11, 11:00 AM EST to August 20, 11:00 PM EST
Where
Carbon forecast zone
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
40.918, -75.709 (the zone’s center; the record gives no point)

Heat, Chester

When
August 11, 11:00 AM EST to August 20, 11:00 PM EST
Where
Chester forecast zone
Reported by
AWOS,ASOS,MESONET,ETC

Heat, Delaware

When
August 11, 11:00 AM EST to August 20, 11:00 PM EST
Where
Delaware forecast zone
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
39.917, -75.399 (the zone’s center; the record gives no point)

Heat, Lehigh

When
August 11, 11:00 AM EST to August 20, 11:00 PM EST
Where
Lehigh forecast zone
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
40.613, -75.592 (the zone’s center; the record gives no point)

Heat, Monroe

When
August 11, 11:00 AM EST to August 20, 11:00 PM EST
Where
Monroe forecast zone
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
41.058, -75.339 (the zone’s center; the record gives no point)

Heat, Montgomery

When
August 11, 11:00 AM EST to August 20, 11:00 PM EST
Where
Montgomery forecast zone
Reported by
AWOS,ASOS,MESONET,ETC

Heat, Northampton

When
August 11, 11:00 AM EST to August 20, 11:00 PM EST
Where
Northampton forecast zone
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
40.754, -75.307 (the zone’s center; the record gives no point)

Heat, Philadelphia

When
August 11, 11:00 AM EST to August 20, 11:00 PM EST
Where
Philadelphia forecast zone
Deaths
8 direct, 0 indirect
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
40.008, -75.134 (the zone’s center; the record gives no point)

The people who died

As the offices recorded each death: direct deaths were caused by the weather itself, indirect ones by something it set in motion.

EventDateAgeSexWhereKind
Heat, Philadelphia2002-08-1553MalePermanent HomeDirect
Heat, Philadelphia2002-08-1662MalePermanent HomeDirect
Heat, Philadelphia2002-08-1877MalePermanent HomeDirect
Heat, Philadelphia2002-08-1872FemalePermanent HomeDirect
Heat, Philadelphia2002-08-2095FemalePermanent HomeDirect
Heat, Philadelphia2002-08-2061MalePermanent HomeDirect
Heat, Philadelphia2002-08-2049FemalePermanent HomeDirect
Heat, Philadelphia2002-08-121FemaleVehicle/Towed TrailerDirect

What these are

Heat
Heat below excessive heat criteria that still caused deaths, injuries or significant impacts.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Pennsylvania in 2002Every state in 2002This day in weather historyWarnings in Pennsylvania, August 2002

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5318185, 5318186, 5318187, 5318188, 5318189, 5318190, 5318191, 5318192, 5318193, 5318274.