By Suryadi INDRAGIRI HILIR, Indonesia — Dahniar starts worrying after a few days without rain during the dry season here on the northeast coast of Sumatra. Traders selling water will complain of supplies drying up. Even Dahniar’s neighbors are reluctant to sell their water when the heat is on and anxiety begins to drip through Kuala Selat village. “It’s difficult if there’s no water — it’s even hard to buy,” Dahniar, a small business owner in her 50s, told Mongabay Indonesia. Indonesia’s meteorology agency, the BMKG, recorded a months-long drought last year across most of the archipelagic nati…