Over 170,000 properties projected to move into the high-risk 100-year floodplain
Properties moving into the 100-year floodplain (draft FEMA maps)
Source: FEMA/Harris County Flood Control District MAAPnext draft flood maps, as reported by KHOU
About 200,000 acres, up from 150,000 under current maps (+33%)
100-year floodplain area under draft FEMA maps
Source: FEMA/Harris County Flood Control District MAAPnext draft flood maps, as reported by KHOU
7th worst of 228 U.S. metro areas for high ozone days
Houston metro rank for ozone pollution
Source: American Lung Association, State of the Air 2025 (2021-2023 monitoring data)
34.8 unhealthy ozone days per year (grade F)
High ozone days per year
Source: American Lung Association, State of the Air 2025 (2021-2023 monitoring data), Harris County
About 2.0 million tons of carbon stored (valued at $272 million)
Carbon stored by the urban forest (City of Houston)
Source: Houston's Urban Forest, 2015 — USDA Forest Service with Texas A&M Forest Service
18%
Tree canopy cover (City of Houston)
Source: Houston's Urban Forest, 2015 — USDA Forest Service with Texas A&M Forest Service