Drought severity index
The Palmer Drought Severity Index is the most widely used index to measure drought severity over time. An index value of zero represents the average moistureconditions observed between 1931 and 1990. Positive values mean wetter than average, negatives mean drier than average.
All our related research and data
Charts
- Accumulated cyclone energy of North Atlantic hurricanes
- Adoption and implementation of policies to reduce disaster risk
- Annual Heat Wave Index in the United States
- Average acres burned per wildfire in the United States
- Death rate from natural disastersIHME, age-standardized
- Death rate from natural disastersIHME, crude
- Death rate from natural disastersWHO
- Deaths from earthquakes
- Deaths from natural disasters as a share of total deaths
- Deaths from natural disasters by type
- Decadal average: Death rates from natural disasters
- Decadal average: Number of deaths from natural disasters
- Direct disaster economic loss
- Direct economic loss attributed to disasters
- Direct economic loss from disasters as a share of GDP
- Disaster risk reduction progress score
- Economic damage by natural disaster type
- Fatality rates due to lightning in the US
- Fatality rates in the US due to weather events
- Frequency of North Atlantic hurricanes
- Global damage costs from natural disasters
- Global injuries from natural disasters
- Global natural disaster death rates
- Global number affected by natural disasters
- Global precipitation anomaly
- Global reported natural disasters by type
- Global weather disaster losses as a share of GDP
- How many deaths does it take for a disaster in different continents to receive news coverage?
- How many deaths does it take for a disaster to receive news coverage?
- Hurricane landfalls in the United States
- Intensity error
- Largest confirmed impact craters on Earth by diameter
- Near-Earth asteroids discovered over time
- News coverage of disasters
- News coverage of disasters, by continent
- Number left homeless from natural disasters
- Number of deaths from natural disasters
- Number of deaths from natural disasters by type
- Number of deaths from volcanic eruptions
- Number of local governments that adopt disaster risk reduction strategies
- Number of recorded natural disaster events
- Number of significant volcanic eruptions
- Number of wildfires in the United States
- People displaced internally by natural disasters
- Power Dissipation Index (PDI) of North Atlantic cyclones
- Precipitation anomaly in the United States
- Rate of deaths and missing persons due to natural disasters
- Score of adoption and implementation of national strategies for managing disaster risk
- Share of US land area that experienced extreme one-day precipitation
- Share of US land area with unusually high annual precipitation
- Share of US land area with unusually high summer temperatures
- Share of US land area with unusually low winter temperatures
- Share of local governments that adopted and implemented local disaster risk reduction strategies in line with national strategies
- Significant earthquakes per year
- Track error
- Wildfire acres burned in the United States