Overview

• Nearly 150 million people from Texas to Maine are under heat alerts as daily highs approach or exceed 100°F in cities such as New York, Philadelphia and Washington, D.C.
• Nighttime temperatures are forecast to remain near 80°F, offering little relief and raising risks for those without effective cooling or adequate hydration.
• The National Weather Service has issued level-4 HeatRisk warnings and warned that more than 250 cities could break daily high temperature records this week.
• Health officials and advocates are urging precautions for vulnerable groups while Philadelphia and New York have opened dozens of cooling centers ahead of the peak heat.
• OSHA is still reviewing proposed regulations to protect outdoor and indoor workers from extreme heat as experts criticize federal readiness amid escalating, climate-driven heat threats.