1997–98 super El Niño and Southeast Asian haze
One of the strongest El Niños on record drove severe drought across Indonesia. Fires set to clear land burned out of control across Sumatra and Kalimantan, producing a regional haze that closed airports and schools in Singapore and Malaysia. The Asian Development Bank later put direct damages at around $9 billion.
Health emergencies across six countries and a multi-month shutdown of regional aviation and shipping visibility.
Spurred Indonesia's later attempts at peatland regulation and the ASEAN Agreement on Transboundary Haze Pollution.
It is the cleanest precedent for what a strong El Niño can do on top of dry, fire-prone landscapes.
