Marine heatwaves are events where ocean temperatures rise to extreme levels and hold steady for at least five days. These heat waves, that occur over the ocean, are likely to extend to 220-250 days a year by 2050, warns a new study. With increasing marine heatwaves, cyclones can intensify, putting fisheries and people living along the coastline, at risk, reports Mongabay India writer Nidhi Jamwal more