Heat dome continues to raise temps across South and Midwest, will begin to move into Northeast ‘Corn sweat’ has increased temperatures throughout the Plains and Midwest this week.

Two of the biggest risks in extreme heat are heat exhaustion and heat stroke. Both can come on fast, and in some cases, become dangerous if left untreated.

A heat dome of high pressure baking the South and Midwest is now spreading its reach into the Northeast to end the week, where feels-like temperatures will skyrocket into the triple digits.

But what exactly makes heat worthy of a weather alert? The criteria change based on the region, but here’s what to keep your eyes peeled for in North Texas.

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The heat wave is nearing the end. There is just one day left in the 90s forecast before we see some relief.

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Best practices to avoid heat stroke are to wear loose-fitting lightweight clothing and drink plenty of fluids. It's also important to remember to never leave someone inside a parked vehicle.

Wednesday has been deemed a severe weather day with dangerous heat moving in.

Our heat wave picks up steam Thursday with highs soaring to the low to mid 90s. In addition, muggier air will push the heat index from the upper 90s into the triple digits.

The heat advisory will be in effect from 11 a.m. through 8 p.m., with the head index reaching a high of 105.

If you don’t recover within 30 minutes, seek further medical help. Heat stroke is an escalation of heat exhaustion. It is the most severe form of heat-related illness and is a medical emergency.