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Heat Advisory – Week of June 17, 2024

The Heat Advisory remains in effect for portions of the region for Tuesday through Tuesday night due to high confidence in at least Impactful Heat conditions occurring during the afternoon and evening Tuesday. Additionally, an Excessive Heat Watch has been issued for Wednesday through Saturday, which covers the same area as the advisory to highlight the anticipated duration of excessive heat impacts into next weekend. Maps of the current hazards have been included, as well as the current forecast for Tuesday and the latest overall key messages for the heatwave.

There are no significant changes to the forecast and we continue to stress the prolonged nature of the heat event, especially along and northwest of I-95. Highs in the upper 80s to near 90° are forecast on Monday. Beginning Tuesday and through the remainder of the week and into next weekend, expect widespread high temperatures in the low to mid 90s each day. By later in the week, high temperatures are forecast to reach the mid to upper 90s to near 100°, and heat indices may exceed 100° on some of the days. The long duration of the heatwave may lead to an increase in heat related impacts than would typically be expected with a shorter duration heat event.

We have included the Weather Prediction Center's latest Key Messages graphic below. You may also wish to check out the new experimental HeatRisk product (linked), which gives a daily break down for potential risk of heat related impact severity.

Hazardous Weather: Heatwave/Excessive Heat
Locations affected: Our entire region, including eastern PA, NJ, DE, and MD
Timing: Heatwave beginning Monday, lasting through at least next weekend. The hottest temperatures and greatest impacts are forecast to occur late this week through Saturday.
Impacts: The prolonged nature of this heatwave/excessive heat can cause heat related stress, particularly among at-risk populations. Those especially vulnerable include elderly, children, those with pre-existing conditions, especially if they live near urban centers without air conditioning.
Confidence on occurrence: High confidence (90-100%) of a heatwave during the week and into next weekend, but lower confidence (50-70%) on the extent of the excessive heat details and impacts.

Real time information/forecasts can be found by visiting
Additional useful links/Public safety Info:
Heat Related Safety Tips:
NWS HeatRisk:
NHTSA Heat Safety Messaging:

Posted in Announcements, Highlands Office of Emergency Management, Uncategorized