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Orange County Health Care Agency

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Situations

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Global measles resurgence 2026

85 clusters · 641 sources · last updated

Latest: CDC and Pennsylvania officials dispute measles death reporting

The 2026 global measles resurgence continues to escalate, driven by declining vaccination rates and misinformation. The World Health Organization (WHO) predicts approximately 11 million infections globally this year, wit

[ACTIVE] [HEALTH] [US]

Southwest US heat wave, wildfire, and monsoon impacts

27 clusters · 93 sources · last updated

Latest: Southern California faces extreme heat and high humidity

By September 9, extreme heat and high humidity continued to impact the Southwest and Southern California. In Southern California, a high-pressure system from Arizona and offshore winds drove multiple temperature records.