Wednesday was yet another very warm day this week for most of Iowa, but showers and clouds kept northcentral Iowa cooler and the rest of the state was a couple degrees cooler than previous days. For Des Moines, the maximum heat index was 98°F, based on available hourly reports. The featured calendar presents the daily maximum heat index values for Des Moines since the first of April. The calendar nicely shows that prior to this week, there was not much to speak of for high index values with only two days in the 90s earlier in June. The summer time heat looks to stick around into next week.