Drought Impact & Desert Growth
US drought severity by state, and the real population growth pouring into the driest ones
We move people to deserts who expect green lawns. The states carrying the worst drought severity right now aren't losing population -- they're gaining it faster than almost anywhere else in the country. Clark County, NV (Las Vegas) and Maricopa County, AZ (Phoenix/Scottsdale) are both among the fastest-growing counties in America, sitting on top of the same Colorado River system now setting record lows. See "Whoever wrote the math wins" for the compact-level mechanism, and "A lush green golf course in Scottsdale" for the other side of the same lawn-culture story. Data current through August 4, 2026.
Drought severity, most recent reading by state
US Drought Monitor (NDMC/USDA/NOAA/NASA), weekly. D2+ = share of the state's own area rated "Severe drought" or worse; D4 = "Exceptional drought," the most severe category on the scale. Sorted worst first.
State As of D2+ (Severe or worse) D4 (Exceptional)
CO Aug 4, 2026 42.1% 4.1%
UT Aug 4, 2026 39.1% 0.0%
WY Aug 4, 2026 38.2% 0.0%
ID Aug 4, 2026 36.9% 2.8%
NM Aug 4, 2026 35.7% 0.0%
OR Aug 4, 2026 32.4% 0.8%
NE Aug 4, 2026 28.7% 1.2%
OK Aug 4, 2026 28.0% 1.0%
SC Aug 4, 2026 25.5% 0.1%
FL Aug 4, 2026 23.0% 0.0%
NV Aug 4, 2026 22.8% 0.0%
SD Aug 4, 2026 20.7% 0.0%
AZ Aug 4, 2026 20.1% 0.0%
MN Aug 4, 2026 16.8% 0.0%
DE Aug 4, 2026 16.6% 0.0%
NC Aug 4, 2026 16.5% 0.2%
AR Aug 4, 2026 16.1% 0.6%
VA Aug 4, 2026 14.8% 0.0%
MD Aug 4, 2026 14.0% 0.0%
ND Aug 4, 2026 12.9% 0.0%
WA Aug 4, 2026 12.9% 0.0%
NJ Aug 4, 2026 12.5% 0.0%
TX Aug 4, 2026 10.4% 0.2%
MT Aug 4, 2026 10.3% 0.0%
MS Aug 4, 2026 10.2% 0.7%
WI Aug 4, 2026 8.8% 0.0%
MA Aug 4, 2026 6.5% 0.0%
NH Aug 4, 2026 6.2% 0.0%
PA Aug 4, 2026 4.1% 0.0%
KS Aug 4, 2026 3.9% 0.0%
MI Aug 4, 2026 1.1% 0.0%
RI Aug 4, 2026 0.7% 0.0%
CA Aug 4, 2026 0.6% 0.0%
GA Aug 4, 2026 0.6% 0.0%
NY Aug 4, 2026 0.4% 0.0%
KY Aug 4, 2026 0.2% 0.0%
IA Aug 4, 2026 0.1% 0.0%
WV Aug 4, 2026 0.1% 0.0%
AL Aug 4, 2026 0.0% 0.0%
AK Aug 4, 2026 0.0% 0.0%
CT Aug 4, 2026 0.0% 0.0%
DC Aug 4, 2026 0.0% 0.0%
HI Aug 4, 2026 0.0% 0.0%
IL Aug 4, 2026 0.0% 0.0%
IN Aug 4, 2026 0.0% 0.0%
LA Aug 4, 2026 0.0% 0.0%
ME Aug 4, 2026 0.0% 0.0%
MO Aug 4, 2026 0.0% 0.0%
OH Aug 4, 2026 0.0% 0.0%
TN Aug 4, 2026 0.0% 0.0%
VT Aug 4, 2026 0.0% 0.0%
The population growing fastest into the driest ground
Real, sourced Census Bureau vintage population estimates for the two counties carrying the sharpest version of this tension -- both drawing directly on the same over-allocated Colorado River system.
County Population Note
Clark County, NV (Las Vegas) 2.42 million (2024) +2.1% year-over-year; 11th most populous US county; 73% of Nevada's entire population
Maricopa County, AZ (Phoenix/Scottsdale) 4.67 million (2024) 3rd-largest numeric population growth of any US county 2023-2024 (+57,471); #1 in the nation for new housing units added that year (38,000)
Not the same severity, but the DMV has been under this too, most of the summer. The Metropolitan Washington Council of Governments declared a regional Drought Watch in early June 2026, covering roughly 6 million people across DC, Maryland, and Northern Virginia -- the region's driest year since 2002, with the Potomac River at its lowest level for that time of year in 130 years of recordkeeping. It doesn't show up as severe in the US Drought Monitor table above (DC and Maryland both read low D2+), because a Drought Watch is a different kind of measurement entirely -- driven by streamflow and reservoir levels and declared by the region's own water utilities, not by the soil-moisture and vegetation data the national D0-D4 scale runs on. Two real, different instruments, both worth reading, not one replacing the other.
Both places are already responding, in real, sourced, opposite-shaped ways. Nevada passed a law in 2021 banning irrigation of purely "nonfunctional" turf -- medians, roundabouts, commercial and HOA common areas, not single-family lawns -- with Colorado River water anywhere in the Las Vegas area, enforced by the Southern Nevada Water Authority's "Cash for Grass" program (up to $5/sq ft to remove it). Arizona took a different route: in June 2023 the state froze new "Certificates of Assured Water Supply" for parts of the Phoenix area relying solely on groundwater, after its own modeling showed a real projected shortfall over the required 100-year supply -- a building moratorium on paper, not a lawn-removal program, but the same underlying math forcing the response.
Sources: US Drought Monitor (NDMC/USDA/NOAA/NASA), U.S. Census Bureau vintage population estimates, Nevada Cash for Grass / SNWA, Arizona Department of Water Resources, WTOP and DC Water on the DMV's own 2026 Drought Watch. See "Whoever wrote the math wins" for the compact history behind this data.