NBC News’ Emilie Ikeda reports tonight on the extreme summer weather across the country impacting tens of millions from raging wildfires to record heat and heavy rain. This as wildfire smoke continues to prompt air quality alerts in more than a dozen states again tonight.

Record-breaking heat arrives Thursday as wildfire smoke blankets the Front Range. Fire danger remains extreme in western Colorado with active fires fueling poor air quality. Here's the latest.

Temperatures are expected to inch closer to triple digits on Wednesday as Northern California continues to heat up throughout the week.