Riedler, 24, woke up Thursday morning knowing something was wrong. She just didn't feel right. She stumbled out of her bedroom door and was running into both sides of the hall when she collapsed at one of her roommate's doors and had a seizure.

Her roommate, Pamela Sawyer, 27, was about to leave for work and hadn't been feeling well either. But when she saw Riedler, she began to put two and two together.

She remembered they had turned on the furnace the night before for the first time and then it clicked for both of them: There was something wrong with the air they were breathing, and they needed to get out of the house — fast.

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