Archive for July, 2013


The National Weather Service reports that it has issued an Excessive Heat Warning at 3:04pm EDT today – Friday, July 05 – until 8:00pm EDT on Sunday, July 07. This warning replaces the previous Excessive Heat Watch.

A prolonged period of hot and very humid weather looks to continue into next week along the interstate 95 urban corridor from Wilmington, DE through Philadelphia and Trenton, including Bucks County.

Heat index values (how hot it feels) between 100° and 102° F will be caused by a combination of temperatures between 92° to 96°, and dew points in the lower 70s.

Uncomfortable and dangerous heat will occur mainly between noon to 8 pm each day, and the low temperature Saturday night may only drop to about 75° in portions of the cities.

The heat wave currently developing for Philadelphia is the third of the season, and will be more adverse than those of late May and June. Monday could see slightly cooler temperatures of only around 90°. Thereafter, it may heat up again into the lower 90s for Tuesday and Wednesday, with still a chance of 90° afternoons continuing into Thursday.

Recommended Precautionary/Preparedness Actions:

An excessive heat warning means that a prolonged period of dangerously hot temperatures will occur. The combination of hot temperatures and high humidity will create a dangerous situation, in which heat illnesses are likely. Drink plenty of fluids, stay out of the sun and, if possible, in an air-conditioned room, and check in on relatives and neighbors — especially the frail and elderly — to make sure they’re okay.

Take extra precautions if you must work or spend time outside. When possible, reschedule strenuous activity to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose-fitting clothing when possible. Drink plenty of water and avoid alcoholic beverages.

To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air-conditioned environments. Anyone overcome by heat should be moved immediately to a cool and shaded location. Heat stroke is an emergency: Call 9-1-1.