Billings Weather Alerts: Extreme Heat Warning and Fire Watch IssuedIf you thought the last few days were warm, hold onto your hats. The National Weather Service has issued an Extreme Heat Warning for the Billings area running straight through Sunday. Monsoonal Moisture Drives Unusually High Humidity in BillingsBecause we're so accustomed to dry summer air, these elevated moisture levels have a lot of us asking what gives. Super El Niño Climate Pattern Amplifies Montana HeatwaveIt isn't just the monsoonal moisture making life uncomfortable in Yellowstone County. READ MORE: Extreme Heat: Crucial Car Safety Tips"Plus we are also experiencing a climate pattern called a super El Niño," McGuire said.