RiceMetaSys was started with the ultimate objective of understanding the system biology of rice under various biotic and abiotic stresses. In the first version of the database (Sandhu et al., 2017), we identified salinity and drought responsive genes in rice through meta-analysis of the genome-wide microarray data under stress and ambient conditions across several genotypes spanning different tissues and growth stages. Among the abiotic stresses in rice, next to drought and salinity, heat (high temperature) is the major issue. With the rising global temperature, this has the potential to turn into a grave threat to rice productivity. In the current version, we have identified heat responsive genes from the heat microarray of five rice genotypes of which two (Nagina 22 and Cultivar 996) are heat tolerant genotypes while the rest (Moroberekkan, IR 64 and Pusa Basmati 1) are heat sensitive.