Natural Hazards Weekly — 2026-07-01

TITLE: Natural Hazards Weekly — Heat dome grips Plains, wildfire declarations surge across Mountain West (2026-07-01)

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Severe Weather

The dominant story is a multi-day extreme heat event across the central Plains combined with an active severe convective line firing along its western flank.

• Extreme Heat Warning from NWS Kansas City/Pleasant Hill runs through the July 3 evening, blanketing a broad swath of eastern Kansas and northwestern Missouri (Wyandotte, Johnson, Buchanan, Adair, and roughly two dozen additional counties) — a genuine public-health event over the holiday travel window.
• Late-evening Severe Thunderstorm Warnings were issued by NWS Lubbock (Lynn/Terry, TX), NWS Wichita (Barton/Russell, KS), and NWS Denver (Sedgwick, CO) with observed severe criteria, marking an active dryline-to-High-Plains storm track on the evening of June 30.
• Flash Flood Warnings were in effect until midnight local for Lubbock County, TX and for Jeff Davis/Reeves counties in the Trans-Pecos (NWS Midland/Odessa), both flagged "likely" with observed rainfall — flooding risk in typically arid West Texas terrain warrants elevated attention.
• Fire Weather Watches from NWS Denver cover the Front Range foothills and eastern plains (Elbert, Douglas, Jefferson, Clear Creek, Gilpin, Summit, Park counties) through 8 PM MDT July 1, reinforcing the wildfire posture that is already driving FEMA activity in the same region.
• A Special Weather Statement for Norton County, KS (NWS Goodland) and a test message out of Montgomery round out the alert queue and require no action.

Federal Declarations

FEMA has authorized five Fire Management Assistance Grants (FMAGs) in the past two weeks, all in the Mountain West and Northern Plains — a clear signal that the 2026 Western fire season is escalating early.

• DR-5642 (Aspen Acres Fire) was declared June 29 for Custer and Pueblo counties, Colorado — the newest declaration and the only Colorado activation, aligning with the Front Range fire-weather watches noted above.
• DR-5641 (Cherry Fire), declared June 27, and DR-5640 (Cottonwood Fire), declared June 22–23, expand federal fire assistance across Tooele, Juab, and Beaver counties in Utah.
• DR-5639 (Iron Fire) received an FMAG June 19–21 spanning three Utah counties (Utah, Juab, Tooele), making it the geographically broadest of the week's Utah declarations.
• DR-5638 (Upriver Fire) was declared June 16 for Spokane County, WA, and DR-5637 (South Fork Fire) covers Sioux County, NE from June 9 with an incident period extended through June 21 — indicating sustained fire activity rather than a single-burn event.

Seismic

A quiet week domestically. The only notable event globally was an M5.0 near Tournavista, Peru (16 km WNW), a moderate crustal event in the sub-Andean fold-and-thrust belt with no US impact and no tsunami implications. All other cataloged events this cycle were microseismicity (M0.4–M2.6) distributed across the usual California (Geysers, Anza, Cobb, Valencia, Willits), Alaska (Perryville, Ninilchik), Hawaii (Waimea), and Puerto Rico (Esperanza) monitoring networks — routine background activity with no damage potential.