Table 3.

Special score assigned to each drought event contained in the database.

Event feature	Range	Points	Condition
Severity (DS)	0–5	5	DS ≥ 90%ile over all the events recorded
(normalized)		4	70%ile ≤ DS < 90%ile over all the events recorded
		3	50%ile ≤ DS < 70%ile over all the events recorded
		2	30%ile ≤ DS < 50%ile over all the events recorded
		1	10%ile ≤ DS < 30%ile over all the events recorded
		0	DS < 10%ile over all the events recorded
Intensity (DI)	0–5	5	DI ≥ 90%ile over all the events recorded
		4	70%ile ≤ DI < 90%ile over all the events recorded
		3	50%ile ≤ DI < 70%ile over all the events recorded
		2	30%ile ≤ DI < 50%ile over all the events recorded
		1	10%ile ≤ DI < 30%ile over all the events recorded
		0	DI < 10%ile over all the events recorded
Area (DA)	0–5	5	DA ≥ 90% of the country (region) area
		4	70%ile ≤ DA < 90%ile of the country (region) area
		3	50%ile ≤ DA < 70%ile of the country (region) area
		2	30%ile ≤ DA < 50%ile of the country (region) area
		1	10%ile ≤ DA < 30%ile of the country (region) area
		0	DA < 10%ile of the country (region) area
Top event	0–4	1	Longest event for the country (region)
		1	Most severe event for the country (region)
		1	Most intense event for the country (region)
		1	Widest (largest area) event for her country (region)
Peak intensity	0–3	3	Lowest indicator value ≤ −2.5σ (σ is drought threshold)
		2	2.5σ ≤ Lowest indicator value < -2σ
		1	2σ ≤ Lowest indicator value < -1.5σ
		0	Lowest indicator value > −1.5σ
Peak area	0–3	3	Largest area ≥ 1M km2 for countries (3M km2 for regions)
		2	500k km2 (2M km2) ≤ Largest area < 1M km2 (3M km2)
		1	250k km2 (1M km2) ≤ Largest area < 500k km2 (2M km2)
		0	Largest area < 250k km2 for countries (1M km2 for regions)
Score (total)	0–25	12–25	Exceptional drought event
		8–11	Severe drought event
		0–7	Moderate drought event