Will Phoenix be under an Extreme Heat Warning for 10+ days in August 2026?

This market will resolve "Yes" if an Extreme Heat Warning is in effect for NWS forecast zone AZZ543 (Central Phoenix) for a cumulative total of 10 or more calendar days during August 1–31, 2026. Otherwise, this market will resolve "No". A calendar day counts if an Extreme Heat Warning is in effect for any portion of that day for the NWS forecast zone AZZ543 (Central Phoenix). The total count of Extreme Heat Warning events for zone AZZ543 can be verified using Iowa Environmental Mesonet's NWS wa