Full Breakdown
NASA Map Reveals Rapid Drought Escalation Across Puerto Rico
9/7/2026, 10:43:08 PM
Core Event: Extreme Drought Spreads Over Three-Quarters of the Island
A NASA Earth Observatory map released on September 2, 2026 shows drought conditions on August 25, 2026. About 75 percent of Puerto Rico was under at least moderate drought, with extreme drought covering 44 percent of the territory. In parts of the south and southwest, rainfall fell to less than 20 percent of normal levels.
Background & Context: Unusual Weather Patterns and El Niño
Puerto Rico’s wet season normally begins in May, but the summer of 2026 was markedly dry. The June-July-August period was the second driest summer since 1950, after 1994. Meteorologist Brandon Wright linked the rapid onset to a developing El Niño, which suppresses Caribbean thunderstorm activity and reduces Atlantic tropical storm formation, creating a feedback loop of reduced cloud cover and higher surface heating.
Data & Statistics
- Extreme drought: 44 percent of the island.
- Moderate-to-severe drought: 75 percent overall.
- Rainfall deficit: Mid-May through mid-July received less than 60 percent of normal precipitation; the driest southern sectors received under 20 percent, a shortfall of 3–6 inches (76–152 mm).
- Temperature anomalies: May ranked among the 15 warmest Julys on record in San Juan; June and July were among the 10 warmest months historically.
- Population affected: More than 3 million residents live in drought-impacted areas.
- River flow: Streamflow reached record lows in waterways such as the Rio Fajardo.
Impact on Residents, Agriculture, and Tourism
Water rationing began in several municipalities in early August, and the governor declared a state of emergency in late July. Farmers reported crop losses for coffee, cacao, banana, and fruit trees, while ranchers faced dwindling hay supplies. The drought threatens tourism development and the reliability of Puerto Rico’s coffee and cacao supply chains, according to a climate-risk analysis by Everloop’s Elena Maksimovich.
Official Statements & Responses
- White House: An official told Newsweek in early August that the administration was “closely” monitoring the situation and had not received any FEMA assistance requests.
- Governor of Puerto Rico: Declared a state of emergency in late July, citing severe water shortages.
- NASA scientists: Senior research scientist David Mocko (Hydrological Sciences Laboratory, Goddard Space Flight Center) explained that satellite-derived soil-moisture estimates, streamflow observations, and well-level data confirmed the rapid drying. Jonathan Case (Marshall Space Flight Center) joined the weekly drought-monitoring team, marking the first year NASA scientists directly produced the maps.
- U.S. Drought Monitor: Updated the assessment on August 18, 2026, noting the swift expansion of extreme-drought zones from none three months earlier.
Why It Matters: Growing Climate Risks
Maksimovich’s risk assessment warns that heat-wave risk will become “extreme” across the island, while exposure to drought, wildfire, and landslide hazards is also rising. Inland and coastal flood risk, though lower, remains a concern for cities such as Caguas, Arecibo, Bayamón, Carolina, and Fajardo.
What’s Next: Anticipated Measures and Ongoing Monitoring
The Everloop report calls for expanded water-storage capacity and notes that water-rationing practices may intensify if drought conditions persist. NASA’s continued involvement in the U.S. Drought Monitor will provide near-real-time data to guide federal disaster designations and support local emergency planning.
