More than 125 million Americans under dangerous heat coast to coast

Key Points:

• Over 125 million Americans face extreme heat alerts spanning from Southern California to the Northeast, with record-breaking temperatures expected in cities like Rapid City, Fargo, and Syracuse.
• Smoke from over 800 Canadian wildfires is anticipated to degrade air quality across the upper Midwest and Northeast starting Wednesday, compounding health risks amid the heat wave.
• The Northeast will experience a heat wave lasting up to five days, with major cities such as New York, Philadelphia, and Washington, D.C. seeing temperatures at or above 90 degrees and heat indices reaching up to 107.
• South-Central Texas is under a significant flood threat with potential rainfall exceeding 15 inches over three days, prompting alerts especially for residents near rivers and low-lying areas.
• Northern New England faces a severe weather risk on Tuesday due to a cold front interacting with extreme heat, bringing storms with destructive winds, large hail, and possible tornadoes, particularly in parts of New York, Vermont, New Hampshire, and Maine.