What Is the Heat Index? How to Stay Safe During Excessive Heat Advisory in Delaware

Heat wave 2025: What is heat index, how to stay safe in extreme heat

Heat indexes in New Jersey are high. Here's what the term means and how to stay safe in a heat wave.

What is the heat index? How to stay safe during excessive heat warnings in Delaware

With a heat wave causing excessive heat warnings in Delaware, you'll hear a lot about the heat index this week. What to know and how to stay cool.

What is the heat index? How to stay safe during excessive heat advisory in Delaware

Heat wave to impact 170 million people in Midwest and Northeast Meteorologists are warning of a dangerous heat wave that is going to grip the Midwest and Northeast regions of the U.S. this weekend. The heat advisory is in effect throughout Delaware through Wednesday, June 23.The heat index in most of Delaware will hit 100 degrees or higher for much of the week.The heat index is what the temperature feels like to the human body when relative humi…

What To Do When the Heat Index Is High

Source: picture alliance / Getty What To Do When the Heat Index Is High When the heat index climbs, it’s not just uncomfortable—it’s dangerous. A high heat index is typically considered anything over 90°F, but it becomes dangerous once it climbs above 103°F. Here’s a quick breakdown: 80–90°F: Caution – Fatigue possible with prolonged exposure or physical activity. 91–103°F: Extreme caution – Heat cramps and heat exhaustion are possible. 104–124…