Five Weeks to Monsoon: A Sourced May 11, 2026 Pre-Season Checklist for Tucson, Marana, Oro Valley & Sahuarita Homeowners and Buyers

Tucson's official monsoon window — June 15 through September 30 per the National Weather Service — opens in roughly five weeks, and the pre-season checklist for 2026 is genuinely different from 2025. NOAA's summer outlook leans wetter than normal across the Desert Southwest, FEMA's updated preliminary Flood Insurance Rate Maps for Pima County, Marana, Oro Valley, Sahuarita, and the City of Tucson just exited their 90-day appeal period on April 29, the Pima County Regional Flood Control District's ALERT network is reporting live from 134-plus rain and stream gauges, and Tucson Electric Power is again asking homeowners to keep tree canopies clear of overhead lines. Here is a sourced May 11, 2026 walk-through of what those changes mean for Tucson-area buyers, sellers, and homeowners — and the practical pre-monsoon checklist that goes with them.