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Air-Quality Alerts in Effect for Susquehanna Valley and Southern California

Officials warn sensitive groups could face unhealthy conditions.

Southern California Air Quality Alert Extended Into Saturday With No-Burn Day In Effect

Multi-State Air Quality Alerts Urge Drivers to Stay Off Roads as Ozone, Smoke Spike

West Coast Heat Wave Triggers Warnings With Portland Under Extreme Alert Through Tuesday

Portland Heat Wave Sets Records as Warnings Extend Into Tuesday