Maryland and Chicago are both preparing for significant weather changes this week, with storms and high temperatures expected. Maryland will see overcast skies with a chance of storms later in the day, potentially impacting the evening commute, while a heat wave is anticipated to follow with highs in the mid-90s and dangerous heat indices. In Chicago, thunderstorms are likely, with a 50 percent chance of rain after midnight, and temperatures reaching near 90 degrees on Wednesday with heightened humidity. Both regions face risks of severe thunderstorms, damaging winds, and potential flooding, particularly in Chicago where a 'Level 1 of 5' tornado risk has been issued. Weather conditions will gradually improve over the weekend with clearer skies and milder temperatures. Residents are advised to stay alert and practice safety measures due to the expected heat and storms.