Uncovering sentiment and retweet patterns of disaster-related tweets from a spatiotemporal perspective - A case study of Hurricane Harvey.

•This study analyzes Hurricane Harvey tweets in a spatiotemporal manner.•Tweets are more positive than negative during all stages of the disaster.•People are more negative during the disaster than before and after the disaster.•The interaction effects of sentiment, area and time on retweet patterns were tested.•The effect of sentiment, area and time on retweet speed was confirmed.